Display substrate and display device

ABSTRACT

A display substrate and a display device are disclosed. The display substrate includes a base substrate; a plurality of pixel driving circuits; a first conductive layer; a first planarization layer; and a second conductive layer; the second conductive layer includes a first conductive portion, the first conductive portion includes a closed annular portion, which is separated from at least one conductive portion adjacent thereto, each light emitting element groups includes a first light emitting element, the first light emitting element includes a first anode, and an orthographic projection of the first anode overlaps with an orthographic projection of the closed annular portion; the plurality of conductive portions further include a second conductive portion adjacent to the first conductive portion, and an orthographic projection of the second conductive portion on the base substrate overlaps with the orthographic projection of the first anode on the base substrate.

This application claims priority to the PCT international patentapplication PCT/CN2020/081154, filed Mar. 25, 2020, the entiredisclosure of which is incorporated herein by reference as part of thepresent application.

TECHNICAL FIELD

Embodiments of the present disclosure relate to a display substrate anda display device.

BACKGROUND

With the continuous development of display technologies, the organiclight emitting diode (OLED) display technology has been increasinglyapplied to various electronic devices due to its advantages such asself-illumination, wide viewing angle, high contrast, low powerconsumption and high reaction speed.

On the other hand, with the continuous development of the OLED displaytechnology, people pose higher requirements for the power consumption,color cast, brightness, stability and other performance of OLED displayproducts.

SUMMARY

Embodiments of the present disclosure provide a display substrate and adisplay device. On the one hand, the closed annular portion can ensurehigher flatness of the first anode, thereby ensuring that the luminousintensity of the first anode in different directions is consistent, andthen effectively alleviating the phenomenon of color cast. On the otherhand, because the closed annular portion has a hollow design, the lighttransmittance of the display substrate can be improved, and it isbeneficial for the under-screen fingerprint recognition device toreceive signals.

At least one embodiment of the present disclosure provides a displaysubstrate, which includes: a base substrate; a plurality of pixeldriving circuits, including a semiconductor layer; a first conductivelayer, at a side of the semiconductor layer away from the basesubstrate; a first planarization layer, at a side of the firstconductive layer away from the base substrate; a second conductivelayer, at a side of the first planarization layer away from the firstconductive layer; a second planarization layer, at a side of the secondconductive layer away from the base substrate; and a plurality of lightemitting element groups, at a side of the second planarization layeraway from the second conductive layer, wherein the second conductivelayer includes a plurality of conductive portions arranged along a firstdirection, a size of each of the plurality of conductive portions in thesecond direction is greater than a size of each of the plurality ofconductive portions in the first direction, the second directionintersects with the first direction, and the plurality of conductiveportions include a first conductive portion, the first conductiveportion includes a closed annular portion, the closed annular portion isseparated from at least one conductive portion adjacent thereto in thefirst direction in the second conductive layer, each of the plurality oflight emitting element groups includes a first light emitting element,the first light emitting element includes a first anode, and anorthographic projection of the first anode on the base substrateoverlaps with an orthographic projection of the closed annular portionon the base substrate; the plurality of conductive portions furtherinclude a second conductive portion adjacent to the first conductiveportion, and an orthographic projection of the second conductive portionon the base substrate overlaps with the orthographic projection of thefirst anode on the base substrate.

For example, in the display substrate provided by an embodiment of thepresent disclosure, a size of the closed annular portion in the firstdirection is at least greater than a size of a part of the firstconductive portion in the first direction, and the plurality of pixeldriving circuits include a first pixel driving circuit, the first pixeldriving circuit has a semiconductor pattern on the semiconductor layer,an orthographic projection of the first conductive portion on the basesubstrate overlaps with an orthographic projection of the semiconductorpattern of the first pixel driving circuit on the base substrate, thefirst pixel driving circuit includes a driving transistor, and the firstconductive layer includes a first conductive pattern, the firstconductive pattern has a same potential as a gate electrode of thedriving transistor, the first conductive pattern and the gate electrodeof the driving transistor together constitute a gate electrode potentialmetal, and an orthographic projection of a hollow region inside theclosed annular portion on the base substrate overlaps with anorthographic projection of the gate electrode potential metal on thebase substrate.

For example, in the display substrate provided by an embodiment of thepresent disclosure, an inner side of the closed annular portion has ahollow region, the first conductive portion has a plurality of hollowregions arranged along the second direction, and shapes and sizes of twoadjacent hollow regions are approximately the same.

For example, in the display substrate provided by an embodiment of thepresent disclosure, the first light emitting element includes aneffective light emitting region, and an orthographic projection of astraight line passing through a center of the effective light emittingregion of the first light emitting element and extending in the seconddirection on the base substrate is located between an orthographicprojection of the first conductive portion on the base substrate and anorthographic projection of the second conductive portion on the basesubstrate.

For example, in the display substrate provided by an embodiment of thepresent disclosure, two edges of the closed annular portion in the firstdirection respectively overlap with orthographic projections of anodesof the plurality of light emitting elements in the light emittingelement group on the base substrate, and an orthographic projection of ahollow region of the closed annular portion on the base substrate isseparated from an orthographic projection of the effective lightemitting regions of the plurality of light emitting elements on the basesubstrate.

For example, in the display substrate provided by an embodiment of thepresent disclosure, the first conductive layer further includes aconductive metal configured to provide power to the pixel drivingcircuit, the first planarization layer includes a conductive metal viahole, and the conductive portion is electrically connected with theconductive metal through the conductive metal via hole, the first pixeldriving circuit further includes a first light emitting controltransistor and a storage capacitor, the storage capacitor includes afirst electrode block and a second electrode block, the second electrodeblock is located at a side of the first electrode block away from thebase substrate, and the conductive metal is respectively electricallyconnected with the source electrode of the first light emitting controltransistor and the second electrode block.

For example, in the display substrate provided by an embodiment of thepresent disclosure, an orthographic projection of the closed annularportion on the base substrate overlaps with an orthographic projectionof the first electrode block on the base substrate, the second electrodeblock includes an opening, an orthographic projection of the opening onthe base substrate overlaps with an orthographic projection of the firstelectrode block on the base substrate, and an orthographic projection ofthe closed annular portion on the base substrate also overlaps with theorthographic projection of the opening on the base substrate.

For example, in the display substrate provided by an embodiment of thepresent disclosure, the first pixel driving circuit further includes adata writing transistor, a compensating transistor, a reset transistor,an anode initialization transistor and a second light emitting controltransistor, the display substrate further includes: a reset signal lineconnected to a gate electrode of the reset transistor; a gate lineconnected to a gate electrode of the compensating transistor; anemission control line connected to a gate electrode of the first lightemitting control transistor; and an initialization signal line connectedto a source electrode of the reset transistor, wherein an orthographicprojection of the closed annular portion on the base substraterespectively overlaps with orthographic projections of the reset signalline, the gate line and the initialization signal line on the basesubstrate.

For example, in the display substrate provided by an embodiment of thepresent disclosure, one end of the first conductive pattern iselectrically connected to the gate electrode of the driving transistorthrough the opening, and the other end of the first conductive patternis electrically connected to the source electrode or drain electrode ofthe compensating transistor.

For example, in the display substrate provided by an embodiment of thepresent disclosure, the closed annular portion includes a first portionand a second portion arranged along the first direction, and a thirdportion and a fourth portion arranged along the second direction, thefirst portion, the third portion, the second portion and the fourthportion are connected end to end to form the closed annular portion, andorthographic projections of the first portion and the second portion onthe base substrate overlap with an orthographic projection of the secondelectrode block on the base substrate.

For example, in the display substrate provided by an embodiment of thepresent disclosure, an orthographic projection of the first portion onthe base substrate overlaps with an orthographic projection of the firstconductive pattern on the base substrate, the first conductive patternand the first portion are both elongated in shape, and an extendingdirection of a long edge of the first conductive pattern is the same asan extending direction of a long edge of the first portion.

For example, in the display substrate provided by an embodiment of thepresent disclosure, the first conductive layer further includes a secondconductive pattern and a third conductive pattern, the second conductivepattern is respectively connected with the initialization signal lineand the source electrode of the reset transistor, and the secondconductive layer further includes an anode connection portion, and thethird conductive pattern is connected with a drain electrode of thesecond light emitting control transistor and the anode connectionportion, an orthographic projection of the third portion on the basesubstrate overlaps with an orthographic projection of the initializationsignal line on the base substrate, the orthographic projection of thethird portion on the base substrate overlaps with an orthographicprojection of the second conductive pattern on the base substrate, anorthographic projection of the fourth portion on the base substrateoverlaps with an orthographic projection of the first conductive patternon the base substrate.

For example, in the display substrate provided by an embodiment of thepresent disclosure, an orthographic projection of the hollow region onthe base substrate overlaps with an orthographic projection of theinitialization signal line on the base substrate, the orthographicprojection of the hollow region on the base substrate overlaps with anorthographic projection of the second conductive pattern on the basesubstrate, and the orthographic projection of the hollow region on thebase substrate overlaps with an orthographic projection of the secondelectrode block on the base substrate.

For example, in the display substrate provided by an embodiment of thepresent disclosure, the plurality of light emitting element groups arearranged along the first direction to form a plurality of light emittingelement columns and along the second direction to form a plurality oflight emitting element rows, each of the plurality of light emittingelement groups includes one first light emitting element, one secondlight emitting element, one third light emitting element and one fourthlight emitting element, and the first anode includes a main bodyportion, an orthographic projection of an effective light emittingregion of the first light emitting element on the base substrate islocated within an orthographic projection of the main body portion ofthe first anode on the base substrate, and the main body portion of thefirst anode and the first anode have at least partially a same boundary,the plurality of conductive portions include a second conductiveportion, the first conductive portion and the second conductive portionare respectively located at two sides of the effective light emittingregion of the first light emitting element in the first direction, and adistance between an orthographic projection of the closed annularportion on the base substrate and an orthographic projection of a centerof the effective light emitting region of the first light emittingelement on the base substrate is approximately the same as a distancebetween an orthographic projection of the second conductive portion onthe base substrate and an orthographic projection of a center of theeffective light emitting region of the first light emitting element onthe base substrate.

For example, in the display substrate provided by an embodiment of thepresent disclosure, an orthographic projection of the first anode on thebase substrate overlaps with an orthographic projection of the emissioncontrol line of the first pixel driving circuit on the base substrate,and a fourth light emitting element is arranged at a position adjacentto a center of the hollow region in the second direction, and anorthographic projection of an anode of the fourth light emitting elementon the base substrate overlaps with all of orthographic projections ofthe gate line, the reset signal line and the initialization signal lineon the base substrate.

For example, in the display substrate provided by an embodiment of thepresent disclosure, an orthographic projection of the gate line on thebase substrate overlaps with an orthographic projection of the firstconductive pattern on the base substrate, in one of the pixel drivingcircuits, orthographic projections of the first electrode block and thesecond electrode block on the base substrate are located between anorthographic projection of the gate line on the base substrate and anorthographic projection of the emission control line on the basesubstrate, an orthographic projection of the reset signal line on thebase substrate is located between the orthographic projection of thegate line on the base substrate and the orthographic projection of theinitialization signal line on the base substrate, the emission controlline, the first electrode block, the gate line, the reset signal lineand the initialization signal line are arranged along the seconddirection.

For example, in the display substrate provided by an embodiment of thepresent disclosure, the plurality of pixel driving circuits furtherinclude a second gate electrode layer located at a side of the firstconductive layer close to the base substrate, the second electrode blockis located in the second gate electrode layer, and at least two of thesecond electrode blocks are connected in the second gate electrodelayer.

For example, in the display substrate provided by an embodiment of thepresent disclosure, orthographic projections of the effective lightemitting region of the first light emitting element and the effectivelight emitting region of the second light emitting element on the basesubstrate do not overlap with an orthographic projection of theconductive portion on the base substrate, and the second light emittingelement is configured to emit green light, an orthographic projection ofa center of the effective light emitting region of the fourth lightemitting element on the base substrate overlaps with the orthographicprojection of the conductive portion on the base substrate, and a partwhere orthographic projections of the conductive portion and the centerof the effective light emitting region of the fourth light emittingelement on the base substrate overlap with each other is a solid part,and the fourth light emitting element is configured to emit blue light.

For example, in the display substrate provided by an embodiment of thepresent disclosure, the second light emitting element includes a secondanode, and an orthographic projection of the effective light emittingregion of the second light emitting element on the base substrate islocated within an orthographic projection of the main body portion ofthe second anode on the base substrate, and the main body portion of thesecond anode and the second anode have at least partially a sameboundary, areas of two overlapping regions of the main body portion ofthe second anode and two conductive portions adjacent to the secondanode in the first direction are approximately the same.

For example, in the display substrate provided by an embodiment of thepresent disclosure, an orthographic projection of the hollow region onthe base substrate is located between the effective light emittingregion of the first light emitting element and the effective lightemitting region of the second light emitting element, and the firstlight emitting element and the second light emitting element are thefirst light emitting element and the second light emitting element whichare closest to each other in the first direction.

For example, in the display substrate provided by an embodiment of thepresent disclosure, in the first direction, a size of an intermediateportion of an anode of the light emitting element configured to emit redlight in the second direction is greater than a size of an edge portionof the anode in the second direction, in the first direction, a size ofan intermediate portion of an anode of the light emitting elementconfigured to emit blue light in the second direction is greater than asize of an edge portion of the anode in the second direction.

For example, in the display substrate provided by an embodiment of thepresent disclosure, in one light emitting element group, orthographicprojections of anodes of at least two light emitting elements on thebase substrate overlap with an orthographic projection of the opening ofthe second electrode block on the base substrate, and an orthographicprojection of the effective light emitting region of at least one lightemitting element on the base substrate does not overlap with anorthographic projection of the first electrode block or the secondelectrode block on the base substrate.

For example, in the display substrate provided by an embodiment of thepresent disclosure, in any light emitting element selected from thegroup consisting of the first light emitting element, the second lightemitting element, the third light emitting element and the fourth lightemitting element, the first planarization layer has an anode hole, andan anode of the light emitting element is connected with a pixel drivingcircuit corresponding to the light emitting element through the anodehole, an orthographic projection of an anode hole of an anode of thelight emitting element configured to emit red light on the basesubstrate does not overlap with an orthographic projection of the mainbody portion of the anode on the base substrate in the second direction,an orthographic projection of an anode hole of an anode of the lightemitting element configured to emit red light on the base substrate doesnot overlap with an orthographic projection of an effective lightemitting region of the light emitting element configured to emit redlight on the base substrate in the second direction, an orthographicprojection of an anode hole of an anode of the light emitting elementconfigured to emit blue light on the base substrate does not overlapwith an orthographic projection of the main body portion of the anode onthe base substrate in the second direction, an orthographic projectionof an anode hole of an anode of the light emitting element configured toemit blue light on the base substrate does not overlap with anorthographic projection of an effective light emitting region of thelight emitting element configured to emit blue light on the basesubstrate in the second direction.

For example, in the display substrate provided by an embodiment of thepresent disclosure, a data line is arranged between two adjacentconductive portions, and a distance between orthographic projections ofany one of the two adjacent conductive portions and the data line on thebase substrate is less than a distance between orthographic projectionsof the two adjacent conductive portions on the base substrate.

At least one embodiment of the present disclosure further provides adisplay device, including any one of the abovementioned displaysubstrate.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of theembodiments of the present disclosure, the drawings of the embodimentswill be briefly described in the following. It is obvious that thedescribed drawings below are only related to some embodiments of thepresent disclosure without constituting any limitation thereto.

FIG. 1 is a schematic partial section view of a display substrate;

FIG. 2 illustrates a schematic diagram of the display substrateillustrated in FIG. 1 emitting light;

FIG. 3 is a schematic plan view of a display substrate according to anembodiment of the present disclosure;

FIG. 4A is a schematic section view of a display substrate according toan embodiment of the present disclosure along the AA direction in FIG. 3;

FIG. 4B is a schematic section view of another display substrateaccording to an embodiment of the present disclosure along the AAdirection in FIG. 3 ;

FIG. 5A is a schematic section view of a display substrate according toan embodiment of the present disclosure along the BB direction in FIG. 3;

FIG. 5B is a schematic section view of a display substrate along the GGdirection in FIG. 3 according to an embodiment of the presentdisclosure;

FIG. 6 is a schematic plan view of a light emitting element in a displaysubstrate according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of the planar relationship between asecond conductive layer and an anode layer in a display substrateaccording to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of a display device according to anembodiment of the present disclosure;

FIG. 9 is a schematic partial section view of another display substrate;

FIG. 10 is a schematic partial section view of another displaysubstrate;

FIG. 11 is a schematic plan view of another display substrate accordingto an embodiment of the present disclosure;

FIG. 12A is a schematic section view of a display substrate according toan embodiment of the present disclosure along the HH direction in FIG.11 ;

FIG. 12B is a schematic section view of a display substrate along JJdirection in FIG. 11 according to an embodiment of the presentdisclosure;

FIG. 13 is a schematic plan view of another display substrate accordingto an embodiment of the present disclosure;

FIG. 14 is a schematic plan view of another display substrate accordingto an embodiment of the present disclosure;

FIG. 15 is a schematic plan view of another display substrate accordingto an embodiment of the present disclosure;

FIG. 16 is a schematic diagram of a display device according to anembodiment of the present disclosure;

FIG. 17 is a schematic diagram of a vapor deposition process using afine metal mask plate;

FIG. 18 is a schematic plan view of a display substrate according to anembodiment of the present disclosure;

FIG. 19 is a schematic section view of a display substrate according toan embodiment of the present disclosure along the CC direction in FIG.18 ;

FIG. 20 is a schematic plan view of another display substrate accordingto an embodiment of the present disclosure;

FIG. 21 is a schematic section view of a display substrate according toan embodiment of the present disclosure along the DD direction in FIG.20 ;

FIG. 22 is a schematic section view of a display substrate according toan embodiment of the present disclosure along the EE direction in FIG.20 ;

FIG. 23 is a schematic diagram of a display device according to anembodiment of the present disclosure;

FIG. 24 is a manufacturing method of a display substrate according to anembodiment of the present disclosure;

FIGS. 25-27 are schematic plan views of a mask plate group according toan embodiment of the present disclosure;

FIG. 28A is a partial schematic diagram of another display substrateaccording to an embodiment of the present disclosure;

FIG. 28B is a partial schematic diagram of another display substrateaccording to an embodiment of the present disclosure;

FIG. 29 is a schematic section view of a display substrate according toan embodiment of the present disclosure along the FF direction in FIG.28A;

FIGS. 30A-30D are schematic plan views of a plurality of film layers ina display substrate according to an embodiment of the presentdisclosure;

FIG. 31 is an equivalent schematic diagram of a pixel driving circuit ina display substrate according to an embodiment of the presentdisclosure;

FIG. 32 is a schematic diagram of a display device according to anembodiment of the present disclosure;

FIG. 33 is a partial schematic diagram of a display substrate accordingto an embodiment of the present disclosure;

FIG. 34 is a schematic section view of a display substrate according toan embodiment of the present disclosure along the KK direction in FIG.33 ;

FIG. 35A is a schematic section view of a display substrate according toan embodiment of the present disclosure along the MM direction in FIG.33 ;

FIG. 35B is a schematic section view of a display substrate according toan embodiment of the present disclosure along the NN direction in FIG.33 ;

FIG. 35C is a schematic section view of a display substrate according toan embodiment of the present disclosure along the QQ direction in FIG.33 ;

FIG. 36 is a schematic plan view of another display substrate accordingto an embodiment of the present disclosure;

FIG. 37A is a partial schematic diagram of another display substrateaccording to an embodiment of the present disclosure;

FIG. 37B is a partial schematic diagram of another display substrateaccording to an embodiment of the present disclosure;

FIG. 38 is a schematic diagram of a display device according to anembodiment of the present disclosure;

FIG. 39 is a schematic diagram of a display substrate according to anembodiment of the present disclosure;

FIG. 40 is a schematic section view of a display substrate along line TTin FIG. 39 ;

FIG. 41 is a schematic diagram of a second conductive layer and an anodelayer in a display substrate according to an embodiment of the presentdisclosure; and

FIG. 42 is a schematic diagram of a display device according to anembodiment of the present disclosure.

DETAILED DESCRIPTION

In order to make objectives, technical details and advantages of theembodiments of the present disclosure more clearly, the technicalsolutions of the embodiments will be described in a clearly and fullyunderstandable way in connection with the drawings related to theembodiments of the present disclosure. Apparently, the describedembodiments are just a part but not all of the embodiments of thepresent disclosure. Based on the described embodiments herein, thoseskilled in the art can obtain other embodiment(s), without any inventivework, which should be within the scope of the present disclosure.

Unless otherwise defined, all the technical and scientific terms usedherein have the same meanings as commonly understood by one of ordinaryskill in the art to which the present disclosure belongs. The terms“first,” “second,” etc., which are used in the present disclosure, arenot intended to indicate any sequence, amount or importance, butdistinguish various components. Also, the terms “comprise,”“comprising,” “include,” “including,” etc., are intended to specify thatthe elements or the objects stated before these terms encompass theelements or the objects and equivalents thereof listed after theseterms, but do not preclude the other elements or objects.

The display device includes a plurality of performance specificationssuch as power consumption, brightness, and chromaticity coordinate, andcolor cast is an important parameter therein. Usually, there are manyfactors that affect the color cast of an OLED display device. From theperspective of the design of the display substrate (an array substrateor a back panel of the OLED), the flatness of an anode greatly affectsthe color cast.

FIG. 1 is a partial schematic cross-sectional view of a displaysubstrate. FIG. 2 is a schematic diagram of light emission performed bythe display substrate shown in FIG. 1 . As shown in FIG. 1 , sub-pixelsof the display substrate include a base substrate 110, a semiconductorlayer 120, a first gate electrode layer 130, a second gate electrodelayer 140, a first conductive layer 150, a first planarization layer241, a second conductive layer 160, a second planarization layer 242, ananode 175, and a pixel defining layer 190 that are sequentiallydisposed. The semiconductor layer 120, the first gate electrode layer130, the second gate electrode layer 140, and the first conductive layer150 may form a pixel driving circuit including a thin film transistorand a storage capacitor. The second conductive layer 160 includes aconnection electrode 161, which is connected to the pixel drivingcircuit through a via hole (not shown) in the first planarization layer241. The anode 170 is connected to the connection electrode 161 througha via hole 271 in the second planarization layer 242. The pixel defininglayer 190 includes an opening 191 to expose a part of the anode 170.When a subsequent organic light emitting layer 180 is formed in theopening 191, the anode 175 may come into contact with the organic lightemitting layer 180 and drive the organic light emitting layer to emitlight. A region defined by the opening 191 is an effective lightemitting region of the sub-pixel.

The via hole 271 in the second planarization layer 242 affects theflatness of the anode 175. If the via hole 271 is relatively close tothe opening 191 (that is, the effective light emitting region), theanode 175 at the location of the opening 191 includes a phenomenon of“inclination”. As a result, the light emitting direction of thesub-pixel is offset. If directions of “inclination” of anodes insub-pixels of different colors are different, as a result, intensitiesof light emitted by the sub-pixels of different colors (for example,red, green, and blue) toward different directions do not match eachother. Consequently, the phenomenon of color cast occurs. For example,when observing from a side of a display device including the displaysubstrate, the display image is red, and when observing from the otherside of display device, the display image is blue.

Regarding this, the embodiments of the present disclosure provide adisplay substrate and a display device. The display substrate includes abase substrate, a first conductive layer, a first planarization layer, asecond conductive layer, a second planarization layer, and a pluralityof light emitting element groups. The first conductive layer is locatedon the base substrate. The first planarization layer is located on aside of the first conductive layer away from the base substrate. Thesecond conductive layer is located on a side of the first planarizationlayer away from the first conductive layer. The second planarizationlayer is located on a side of the second conductive layer away from thefirst planarization layer. The plurality of light emitting elementgroups are located on a side of the second planarization layer away fromthe base substrate. The plurality of light emitting element groups arearranged along a first direction to form a plurality of light emittingelement columns, and are arranged along a second direction to form aplurality of light emitting element rows. Each light emitting elementgroup includes a first light emitting element, a second light emittingelement, a third light emitting element, and a fourth light emittingelement. The second light emitting element and the third light emittingelement are arranged along the second direction to form a light emittingelement pair. The first light emitting element, the light emittingelement pair, and the third light emitting element are arranged alongthe first direction. The first light emitting element includes a firstanode. The second light emitting element includes a second anode. Thethird light emitting element includes a third anode. The fourth lightemitting element includes a fourth anode. The second conductive layerincludes a first connection electrode, a second connection electrode, athird connection electrode, and a fourth connection electrode. Thesecond planarization layer includes a first via hole, a second via hole,a third via hole, and a fourth via hole. The first anode is connected tothe first connection electrode through the first via hole. The secondanode is connected to the second connection electrode through the secondvia hole. The third anode is connected to the third connection electrodethrough the third via hole. The fourth anode is connected to the fourthconnection electrode through the fourth via hole. A plurality of thirdvia holes corresponding to one light emitting element row areapproximately located on a first straight line extending along the firstdirection, and an orthographic projection of the fourth via hole closestto the first straight line on the base substrate is located on a side ofthe first straight line close to the fourth anode corresponding to thefourth via hole. Therefore, in the display substrate, the location ofthe fourth via hole is moved toward the fourth anode, so that thedistance between the fourth via hole and the effective light emittingregion of the adjacent first light emitting element is increased, toensure the flatness of the first anode located in the effective lightemitting region of the first light emitting element, thereby avoidingthe phenomenon of color cast; the distance between the fourth via holeand the effective light emitting region of the fourth light emittingelement is reduced, so that resistance between the fourth anode locatedin the effective light emitting region of the fourth light emittingelement and the fourth connection electrode is reduced, and the distancebetween the first anode and the fourth anode is increased, to avoidshort-circuiting between the first anode and the fourth anode due toresidues left in the manufacturing process.

The display substrate and the display device that are provided in theembodiments of the present disclosure are described in detail below withreference to the accompanying drawings.

An embodiment of the present disclosure provides a display substrate.FIG. 3 is a schematic planar diagram of a display substrate according toan embodiment of the present disclosure. FIG. 4A and FIG. 4B areschematic cross-sectional views of a display substrate according to anembodiment of the present disclosure along an AA direction in FIG. 3 .FIG. 5A is a schematic cross-sectional view of a display substrateaccording to an embodiment of the present disclosure along a BBdirection in FIG. 3 . FIG. 5B is a schematic cross-sectional view of adisplay substrate according to an embodiment of the present disclosurealong a GG direction in FIG. 3 . FIG. 6 is a schematic planar diagram ofa light emitting element in a display substrate according to anembodiment of the present disclosure.

As shown in FIG. 3 , FIG. 4A, FIG. 4B, FIG. 5A, FIG. 5B, and FIG. 6 ,the display substrate 100 includes a base substrate 110, a firstconductive layer 150, a first planarization layer 241, a secondconductive layer 160, a second planarization layer 242, and a pluralityof light emitting element groups 310. The first conductive layer 150 islocated on the base substrate 110. The first planarization layer 241 islocated on a side of the first conductive layer 150 away from the basesubstrate 110. The second conductive layer 160 is located on a side ofthe first planarization layer 241 away from the first conductive layer150. The second planarization layer 242 is located on a side of thesecond conductive layer 160 away from the first planarization layer 241.The plurality of light emitting element groups 310 are located on a sideof the second planarization layer 242 away from the base substrate 110.The plurality of light emitting element groups 310 are arranged along afirst direction to form a plurality of light emitting element columns320, and are arranged along a second direction to form a plurality oflight emitting element rows 330. Each light emitting element group 310includes a first light emitting element 311, a second light emittingelement 312, a third light emitting element 313, and a fourth lightemitting element 314. The second light emitting element 312 and thethird light emitting element 313 are arranged along the second directionto form a light emitting element pair 315. The first light emittingelement 311, the light emitting element pair 315, and the fourth lightemitting element 314 are arranged along the first direction. The firstlight emitting element 311 includes a first anode 1751. The second lightemitting element includes a second anode 1752. The third light emittingelement includes a third anode 1753. The fourth light emitting elementincludes a fourth anode 1754. The second conductive layer 160 includes afirst connection electrode 1611, a second connection electrode 1612, athird connection electrode 1613, and a fourth connection electrode 1614.The second planarization layer 242 includes a first via hole 2421, asecond via hole 2422, a third via hole 2423, and a fourth via hole 2424.The first anode 1751 is connected to the first connection electrode 1611through the first via hole 2421. The second anode 1752 is connected tothe second connection electrode 1612 through the second via hole 2422.The third anode 1753 is connected to the third connection electrode 1613through the third via hole 2423. The fourth anode 1754 is connected tothe fourth connection electrode 1614 through the fourth via hole 2424. Aplurality of third via holes 2423 corresponding to a light emittingelement row 330 are approximately located on a first straight line 301extending along the first direction, and an orthographic projection ofthe fourth via hole 2424 closest to the first straight line 301 on thebase substrate 110 is located on a side of the first straight line 301close to the fourth anode 1754 corresponding to the fourth via hole2424. It should be noted that, the foregoing first conductive layer andsecond conductive layer are sequentially stacked along a direction awayfrom the base substrate.

In the display substrate provided in this embodiment of the presentdisclosure, the second light emitting element and the third lightemitting element are arranged along the second direction to form thelight emitting element pair. The first light emitting element, the lightemitting element pair, and the third light emitting element are arrangedalong the first direction. That is, the second anode and the third anodeare arranged along the second direction to form an anode pair. The firstanode, the anode pair, and the third anode are arranged along the firstdirection. The orthographic projection of the fourth via hole closest tothe first straight line on the base substrate is located on the side ofthe first straight line close to the fourth anode. That is, in thedisplay substrate, the location of the fourth via hole is moved towardthe fourth anode. Therefore, the display substrate includes thefollowing beneficial effects: (1) the distance between the fourth viahole and the effective light emitting region of the adjacent first lightemitting element is increased, to ensure the flatness of the first anodelocated in the effective light emitting region of the first lightemitting element, thereby avoiding the phenomenon of color cast; (2) thedistance between the fourth via hole and the effective light emittingregion of the fourth light emitting element is reduced, so thatresistance between the fourth anode located in the effective lightemitting region of the fourth light emitting element and the fourthconnection electrode is reduced, and (3) the distance between the firstanode and the fourth anode is increased, to avoid short-circuitingbetween the first anode and the fourth anode due to residues left in themanufacturing process.

For example, as shown in FIG. 5A, FIG. 5B, and FIG. 6 , in the displaysubstrate, the location of the fourth via hole 2424 is moved toward thefourth anode 1754. Therefore, the distance between the fourth via hole2424 and the effective light emitting region (that is, a region definedby the opening 1951) of the adjacent first light emitting element isincreased. In addition, because the fourth anode includes a connectionportion connected to a pixel driving circuit below the fourth anode,when the location of the fourth via hole 2424 is moved toward the fourthanode 1754, the fourth via hole 2424 is not overlapped with theeffective light emitting region (that is, the region defined by theopening 1954) of the fourth light emitting element. In this case, boththe distance between the fourth via hole 2424 and the effective lightemitting region of the adjacent first light emitting element and thedistance between the fourth via hole 2424 and the effective lightemitting region of the fourth light emitting element are proper, so thatthe flatness of the first anode located in the effective light emittingregion of the first light emitting element and the flatness of thefourth anode located in the effective light emitting region of thefourth light emitting element can be both ensured, thereby avoiding thephenomenon of color cast.

For example, as shown in FIG. 5A, FIG. 5B, and FIG. 6 , in the displaysubstrate, the location of the fourth via hole 2424 is moved toward thefourth anode 1754, so that the distance between the fourth via hole 2424and the effective light emitting region of the fourth light emittingelement is reduced, thereby reducing the resistance between the fourthanode located in the effective light emitting region of the fourth lightemitting element and the fourth connection electrode. On the other hand,in the display substrate, the location of the fourth via hole 2424 ismoved toward the fourth anode 1754, so that the distance between thefirst anode 1751 and the fourth anode 1754 is increased, therebyavoiding short-circuiting between the first anode 1751 and the fourthanode 1754 due to residues left in the manufacturing process.

For example, a shortest distance between the orthographic projection ofthe first anode on the base substrate and the orthographic projection ofthe adjacent fourth anode on the base substrate is greater than 0.8times of the width of the effective light emitting region of the firstlight emitting element in the first direction, thereby effectivelyavoiding short-circuiting between the first anode and the fourth anodedue to residues left in the manufacturing process.

For example, as shown in FIG. 6 , the fourth anode 1754 includes a bodyportion 1754A and a connection portion 1754B. The effective lightemitting region of the fourth light emitting element 314 falls into theorthographic projection of the body portion 1754A on the base substrate110. The connection portion 1754B is connected to the correspondingfourth connection electrode 1614 through the fourth via hole 2424. Theconnection portion 1754B is located on a side of the first straight line301 close to the body portion 1754A, to effectively reduce the area ofthe connection portion, thereby reducing the resistance between thefourth anode located in the effective light emitting region of thefourth light emitting element and the fourth connection electrode. Forexample, as shown in FIG. 6 , the fourth anode 1754 further includes afirst supplementing portion 1754C, which can cover two channel regionsof a compensating thin film transistor in a corresponding one of theplurality of pixel driving circuits, to improve the stability and theservice life of the compensating thin film transistor, thereby improvingthe long-term light emission stability and the service life of thedisplay substrate.

In some examples, as shown in FIG. 6 , the first supplementing portion1754C is protruded from the fourth body portion 1754A toward the thirdanode 1753, and the first supplementing portion 1754C is located on aside of the fourth connection portion 1754B close to the fourth bodyportion 1754A.

In some examples, as shown in FIG. 6 , the first supplementing portion1754C is connected to both the fourth body portion 1754A and the fourthconnection portion 1754B. Therefore, the display substrate can fully usethe area on the display substrate, to densely arrange the first anode,the second anode, the third anode, and the fourth anode, so that theresolution of the display substrate can be ensured.

For example, as shown in FIG. 4A, the display substrate includes a basesubstrate 110, a semiconductor layer 120, a first insulating layer 361,a first gate electrode layer 130, a second insulating layer 362, asecond gate electrode layer 140, an interlaminar insulating layer 363, afirst conductive layer 150, a first planarization layer 241, a secondconductive layer 160, and a second planarization layer 242 that aresequentially disposed. The first gate electrode layer 130 may include agate electrode line 131 and a first electrode block CE1. The second gateelectrode layer may include a second electrode block CE2. Theorthographic projection of the first electrode block CE1 on the basesubstrate 110 is at least partially overlapped with the orthographicprojection of the second electrode block CE2 on the base substrate 110,to form a storage capacitor.

For example, as shown in FIG. 4A, the first conductive layer 150 mayfurther include a power line and a data line. The second conductivelayer 160 may include a conductive layer overlapping the power line. Theconductive portion may be electrically connected to the power line, toreduce the resistance of the power line.

For example, as shown in FIG. 4B, the display substrate may furtherinclude a passivation layer 364, located between the first conductivelayer 150 and the first planarization layer 241. Certainly, thisembodiment of the present disclosure includes but is not limitedthereto. Alternatively, a passivation layer may not be disposed on thedisplay substrate.

In some examples, as shown in FIG. 6 , a plurality of second via holes2422 corresponding to a light emitting element row 330 adjacent to thelight emitting element row 330 corresponding to the first straight line301 are also approximately located on the first straight line 301.

In some examples, as shown in FIG. 3 , the fourth via hole 2424 in alight emitting element group 310 is located on a side that is of thefirst anode 1751 in the light emitting element group 310 adjacent to thelight emitting element group 310 in the second direction and that isalong a bisector in the second direction, for example, a side that is ofthe first anode 1751 close to the second anode 1752 in the lightemitting element group 310 in which the first anode 1751 is locatedalong the bisector in the second direction. That is, the fourth via holein a light emitting element group is located on a side that is of thefirst anode in the light emitting element group adjacent to the lightemitting element group in the second direction and that is along abisector in the second direction. In some examples, as shown in FIG. 3 ,in a light emitting element group 310, the first via hole 2421 islocated on a side of the first anode 1751 along a bisector in the seconddirection, for example, a side of the first anode 1751 close to thethird anode 1753 along the bisector in the second direction; the secondvia hole 2422 is located on a side of the second anode 1752 close to thefirst anode 1751 along the bisector in the second direction; and thethird via hole 2423 is located on a side of the third anode 1753 closeto the first anode 1751 along the bisector in the second direction.

In some examples, as shown in FIG. 6 , a plurality of fourth via holes2424 corresponding to a light emitting element row 330 are approximatelylocated on a straight line extending along the first direction. Thestraight line runs through a plurality of first anodes 1751 or aplurality of first via holes 2421 corresponding to the light emittingelement row 330.

In some examples, as shown in FIG. 6 , a plurality of fourth via holes2424 corresponding to a light emitting element column 320 areapproximately located on a second straight line extending along thesecond direction. The second straight line runs through a plurality offirst anodes 1751 or effective light emitting regions of a plurality offirst light emitting elements 311 corresponding to the light emittingelement column 320.

In some examples, as shown in FIG. 6 , a distance between the fourthanode 1754 and the first anode 1751 closest to the fourth anode 1754 isless than a distance between the first anode 1751 located in the samerow and the fourth 1754 closest to the first anode 1751.

In some examples, as shown in FIG. 6 , the light emitting element groups310 include a first light emitting element group and a second lightemitting element group that are adjacent in the second direction. Thefirst light emitting element group and the second light emitting elementgroup are respectively disposed in two adjacent light emitting elementrows 330. A connection portion of the fourth anode 1754 in the firstlight emitting element group and a connection portion of the first anode1751 in the second light emitting element group are both located on thesame side of the fourth anode 1754 along a bisector in the seconddirection. That is, the connection portion of the fourth anode and theconnection portion of the first anode adjacent to the fourth anode inthe second direction are provided on the same side of the body portionof the fourth anode along the bisector in the second direction.

In some examples, as shown in FIG. 6 , the shape of the body portion ofthe first anode 1751 include a hexagon, and a point of the first anode1751 closest to the fourth anode 1754 adjacent to the first anode 1751in the second direction is a vertex of the hexagon.

In some examples, as shown in FIG. 6 , two adjacent light emittingelement rows 330 are offset from each other by ½ pitch. The foregoingpitch is equal to a distance between centers of effective light emittingregions of two first light emitting elements 311 in two light emittingelement groups 310 that are adjacent in the first direction.

In some examples, as shown in FIG. 6 , the first straight line 301 islocated between the two adjacent light emitting element rows 330.

In some examples, as shown in FIG. 5A, FIG. 5B, and FIG. 6 , theorthographic projection of the first via hole 2421 closest to the firststraight line 301 on the base substrate 110 is located on a side of thefirst straight line 301 close to the first anode 1751 corresponding tothe first via hole 2421. That is, in the display substrate, the locationof the first via hole is moved toward the first anode. Therefore, thedisplay substrate includes the following beneficial effects: (1) thedistance between the first via hole and the effective light emittingregion of the fourth light emitting element closest to the first viahole in the second direction is increased, to ensure the flatness of thefourth anode located in the effective light emitting region of theadjacent fourth light emitting element, thereby avoiding the phenomenonof color cast; (2) the distance between the first via hole and theeffective light emitting region of the first light emitting element isreduced, so that resistance between the first anode located in theeffective light emitting region of the first light emitting element andthe first connection electrode is reduced, and (3) the distance betweenthe first anode and the fourth anode is increased, to avoidshort-circuiting between the first anode and the fourth anode due toresidues left in the manufacturing process. Certainly, this embodimentof the present disclosure includes but is not limited thereto. Theorthographic projection of the first via hole on the base substrate mayalternatively be located on the first straight line.

In some examples, as shown in FIG. 6 , the distance between theorthographic projection of the fourth via hole 2424 on the basesubstrate 110 and the orthographic projection of the first straight line301 on the base substrate 110 is greater than the distance between theorthographic projection of the first via hole 2421 on the base substrate110 and the orthographic projection of the first straight line 301 onthe base substrate 110. That is, compared with the first straight line,the amount of the offset of the fourth via hole is larger. Certainly,this embodiment of the present disclosure includes but is not limitedthereto. Compared with the first straight line, the amount of the offsetof the fourth via hole may alternatively be equal to the amount of theoffset of the first via hole.

In some examples, as shown in FIG. 6 , there is a first shortestdistance L1 between the orthographic projection of the effective lightemitting region of the second light emitting element 312 on the basesubstrate 110 and the orthographic projection of the second via hole2422 on the base substrate 110. There is a second shortest distance L2between the orthographic projection of the effective light emittingregion of the third light emitting element 313 on the base substrate 110and the orthographic projection of the third via hole 2423 on the basesubstrate 110. The first shortest distance L1 is approximately equal tothe second shortest distance L2. It should be noted that, that theforegoing first shortest distance is approximately equal to the secondshortest distance includes a case that the first shortest distance iscompletely equal to the second shortest distance, and also includes acase that a difference between the first shortest distance and thesecond shortest distance is less than 1 micron.

Therefore, the display substrate can enable the degree of inclination ofthe second anode located in the effective light emitting region of thesecond light emitting element to be the same as the degree ofinclination of the third anode located in the effective light emittingregion of the third light emitting element, and enable the inclinationdirections thereof to be opposite, to effectively avoid the phenomenonof color cast. It should be noted that, when the second anode located inthe effective light emitting region of the second light emitting elementand the third anode located in the effective light emitting region ofthe third light emitting element do not incline, it may be consideredthat the degree of inclination of the second anode located in theeffective light emitting region of the second light emitting element andthe degree of inclination of the third anode located in the effectivelight emitting region of the third light emitting element are zero. Inaddition, the first shortest distance between the orthographicprojection of the effective light emitting region of the second lightemitting element on the base substrate and the orthographic projectionof the second via hole on the base substrate may be a shortest distancebetween an edge of the orthographic projection of the effective lightemitting region of the second light emitting element on the basesubstrate and an edge of the orthographic projection of the second viahole on the base substrate. Similarly, the second shortest distancebetween the orthographic projection of the effective light emittingregion of the third light emitting element on the base substrate and theorthographic projection of the third via hole on the base substrate maybe a shortest distance between an edge of the orthographic projection ofthe effective light emitting region of the third light emitting elementon the base substrate and an edge of the orthographic projection of thethird via hole on the base substrate.

In some examples, as shown in FIG. 6 , a distance C between theorthographic projection of the fourth via hole 2424 on the basesubstrate 110 and the orthographic projection of the effective lightemitting region of the first light emitting element 311 adjacent in thesecond direction on the base substrate 110 is greater than 1.2 times ofthe width A of the effective light emitting region of the first lightemitting element 311 adjacent in the second direction in the firstdirection. Therefore, the display substrate can ensure that the firstanode located in the effective light emitting region of the first lightemitting element includes relatively good flatness.

In some examples, as shown in FIG. 6 , a shortest distance B between thefourth via hole 2424 in a light emitting element group 310 and the firstanode 1751 in an adjacent light emitting element group 310 is less thana distance E between the fourth via hole 2424 in the light emittingelement group 310 and an effective light emitting region of thecorresponding fourth light emitting element group 314.

In some examples, as shown in FIG. 6 , a shortest distance between thefourth anode 1754 in a light emitting element group 310 and the firstanode 1751 in a light emitting element group 310 closest to the fourthanode 1754 in the second direction is a distance between a vertex of thefirst anode 1751 in an adjacent light emitting element group 310 and thefourth anode 1754 in the light emitting element group 310. That is, thevertex of the first anode 1751 in the adjacent light emitting elementgroup 310 is a point closest to the fourth anode 1754 in the lightemitting element group 310. For example, the shape of the orthographicprojection of the first anode 1751 on the base substrate 110 is ahexagon, and the vertex is a vertex on a long axis of the hexagon.

In some examples, as shown in FIG. 3 , FIG. 4A, FIG. 4B, FIG. 5A, FIG.5B. and FIG. 6 , the display substrate 100 further includes a pixeldefining layer 190. The pixel defining layer 190 is located on a side ofthe first anode 1751, the second anode 1752, the third anode 1753, andthe fourth anode 1754 away from the base substrate 110. The pixeldefining layer 190 includes a first opening 1951, a second opening 1952,a third opening 1953, and a fourth opening 1954. The first lightemitting element 311 includes a first light emitting portion 1851. Thesecond light emitting element 312 includes a second light emittingportion 1852. The third light emitting element 313 includes a thirdlight emitting portion 1853. The fourth light emitting element 314includes a fourth light emitting portion 1854. The first opening 1951falls into the orthographic projection of the first anode 1751 on thebase substrate 110. At least a part of the first light emitting portion1851 is located in the first opening 1951 and covers an exposed part ofthe first anode 1751. The second opening 1952 falls into theorthographic projection of the second anode 1752 on the base substrate110. At least a part of the second light emitting portion 1852 islocated in the second opening 1952 and covers an exposed part of thesecond anode 1752. The third opening 1953 falls into the orthographicprojection of the third anode 1753 on the base substrate 110. At least apart of the third light emitting portion 1853 is located in the thirdopening 1953 and covers an exposed part of the third anode 1753. Thefourth opening 1954 falls into the orthographic projection of the fourthanode 1754 on the base substrate 110. At least a part of the fourthlight emitting portion 1854 is located in the fourth opening 1954 andcovers an exposed part of the fourth anode 1754. A region defined by thefirst opening 1951 is an effective light emitting region of the firstlight emitting element 311. A region defined by the second opening 1952is an effective light emitting region of the second light emittingelement 312. A region defined by the third opening 1953 is an effectivelight emitting region of the third light emitting element 313. A regiondefined by the fourth opening 1954 is an effective light emitting regionof the fourth light emitting element 314.

In some examples, as shown in FIG. 6 , the distance C between theorthographic projection of the fourth via hole 2424 on the basesubstrate 110 and the orthographic projection of the first opening 1951adjacent in the second direction on the base substrate 110 is greaterthan 1.2 times of the width A of the first opening 1951 in the firstdirection. Therefore, the display substrate can ensure that the firstanode located in the first opening (that is, a part that is of the firstanode and that is exposed by the first opening) includes relatively goodflatness.

In some examples, as shown in FIG. 3 , FIG. 4A, FIG. 4B, FIG. 5A, FIG.5B. and FIG. 6 , the display substrate 100 includes a firstplanarization layer 241 and a first conductive layer 150. The firstplanarization layer 241 is located on a side of the second conductivelayer 160 close to the base substrate 110. The first conductive layer150 is located on a side of the first planarization layer 241 close tothe base substrate 110. The first conductive layer 150 includes a firstdrain electrode 1511, a second drain electrode 1512, a third drainelectrode 1513, and a fourth drain electrode 1514. The firstplanarization layer 241 includes a fifth via hole 2415, a sixth via hole2416, a seventh via hole 2417, and an eighth via hole 2418. The firstconnection electrode 1611 is connected to the first drain electrode 1511through the fifth via hole 2415. The second connection electrode 1612 isconnected to the second drain electrode 1512 through the sixth via hole2416. The third connection electrode 1613 is connected to the thirddrain electrode 1513 through the seventh via hole 2417. The fourthconnection electrode 1614 is connected to the fourth drain electrode1514 through the eighth via hole 2418.

In some examples, as shown in FIG. 4A and FIG. 4B, the display substrate100 further includes a first pixel driving circuit 2651, a second pixeldriving circuit 2652, a third pixel driving circuit 2653, and a fourthpixel driving circuit 2654. The first drain electrode 1511 is a part ofthe first pixel driving circuit 2651. The second drain electrode 1512 isa part of the second pixel driving circuit 2652. The third drainelectrode 1513 is a part of the third pixel driving circuit 2653. Thefourth drain electrode 1514 is a part of the fourth pixel drivingcircuit 2654. The first pixel driving circuit 2651 is connected to thefirst anode 1751 through the first connection electrode 1611, to apply adrive signal to the first anode 1751. The second pixel driving circuit2652 is connected to the second anode 1752 through the second connectionelectrode 1612, to apply a drive signal to the second anode 1752. Thethird pixel driving circuit 2653 is connected to the third anode 1753through the third connection electrode 1613, to apply a drive signal tothe third anode 1753. The fourth pixel driving circuit 2654 is connectedto the fourth anode 1754 through the fourth connection electrode 1614,to apply a drive signal to the fourth anode 1754.

FIG. 7 is a schematic diagram of a planar relationship between a secondconductive layer and an anode layer in a display substrate according toan embodiment of the present disclosure. As shown in FIG. 6 and FIG. 7 ,the second anode 1752 and the third anode 1753 are arranged along thesecond direction to form an anode pair 1755. The first anode 1751, theanode pair 1755, and the fourth anode 1754 are arranged along the firstdirection. The second conductive layer 160 further includes a firstconductive portion 1621, a second conductive portion 1622, a thirdconductive portion 1623, and a fourth conductive portion 1624 thatextend along the second direction. The first conductive portion 1621 islocated on a side of the first anode 1751 away from the anode pair 1755.The second conductive portion 1622 is located between the first anode1751 and the anode pair 1755. The third conductive portion 1623 islocated between the anode pair 1755 and the fourth anode 1754. Thefourth conductive portion 1624 is overlapped with the fourth anode 1754.In this display substrate, the first conductive portion 1621, the secondconductive portion 1622, the third conductive portion 1623, and thefourth conductive portion 1624 that extend along the second directionmay be connected to the power line in the first conductive layer 150, toreduce the resistance of the power line.

In some examples, as shown in FIG. 7 , the orthographic projection ofthe first conductive portion 1621 and the second conductive portion 1622on the base substrate 110 is not overlapped with the orthographicprojection of the first anode 1751 on the base substrate 110. Theorthographic projection of the second conductive portion 1622 and thethird conductive portion 1623 on the base substrate 110 does is notoverlapped with the orthographic projection of the anode pair 1755 onthe base substrate 110. Therefore, the first conductive portion 1621 andthe second conductive portion 1622 have relatively small impact on theflatness of the first anode 1751. The second conductive portion 1622 andthe third conductive portion 1623 have relatively small impact on theflatness of the second anode 1752 and the third anode 1753. Certainly,this embodiment of the present disclosure includes but is not limitedthereto. The first conductive portion, the second conductive portion,and the third conductive portion may be alternatively overlapped withthe anode.

For example, the orthographic projections of the first conductiveportion 1621 and the second conductive portion 1622 on the basesubstrate 110 respectively form a first overlapping portion and a secondoverlapping portion with the orthographic projection of the first anode1751 on the base substrate 110. The area of the first overlappingportion is approximately equal to that of the second overlappingportion, so that the flatness of the first anode 1751 can also beimproved. Similarly, the orthographic projections of the secondconductive portion 1622 and the third conductive portion 1623 on thebase substrate 110 respectively form a third overlapping portion and afourth overlapping portion with the orthographic projection of anodepair 1755 on the base substrate 110. The area of the third overlappingportion is approximately equal to that of the fourth overlappingportion, so that the flatness of the second anode 1752 and the thirdanode 1753 of the anode pair 1755 can also be improved. It should benoted that, the foregoing “approximately equal” includes a case of exactequivalence, and a case that a difference between the two is less than10% of an average value of the two.

For example, the first overlapping portion and the second overlappingportion are symmetric about a body portion of the first anode 1751, thatis, the effective light emitting region of the first light emittingelement 311, along a bisector in the second direction, to furtherimprove the flatness of the effective light emitting region of the firstlight emitting element 311. The third overlapping portion and the fourthoverlapping portion are symmetric about the anode pair 1755 along thebisector in the second direction, to further improve the flatness of thesecond anode 1752 and the third anode 1753 of the anode pair 1755.

In some examples, as shown in FIG. 7 , the orthographic projection ofthe fourth conductive portion 1624 on the base substrate 110 runsthrough a center of the orthographic projection of the fourth anode 1754on the base substrate 110, and the orthographic projection of the fourthconductive portion 1624 on the base substrate 110 along the bisector inthe second direction is overlapped with the orthographic projection ofthe effective light emitting region of the fourth light emitting element314 on the base substrate 110 along the bisector in the seconddirection. In this way, the flatness of the fourth anode 1754 can alsobe improved.

In some examples, as shown in FIG. 7 , the second conductive layer 160further includes a fifth conductive portion 1625 and a sixth conductiveportion 1626 that extend along the first direction. The fifth conductiveportion 1625 is separately connected to the second conductive portion1622 and the third conductive portion 1623, and is located between thesecond anode 1752 and the third anode 1753. The sixth conductive portion1626 is separately connected to the third conductive portion 1623 andthe fourth conductive portion 1624, and is located between the firstanode 1751 and the fourth anode 1754 that are adjacent in the seconddirection. Therefore, the foregoing first conductive portion 1621,second conductive portion 1622, third conductive portion 1623, fourthconductive portion 1624, fifth conductive portion 1625, and sixthconductive portion 1626 may form a reticular structure, to furtherreduce the resistance of the power line in the first conductive layer,and further improve the electric performance of the display substrate.

In some examples, as shown in FIG. 7 , the second conductive portion1622 includes a body portion 1622A, a heel block 1622B, and a connectionblock 1622C that extend along the second direction. The heel block 1622Bis located on a side of the body portion 1622A close to the first anode1751, and is spaced from the body portion 1622A. The heel block 1622B isconnected to the body portion 1622A through the connection block 1622C.Because usually, the size of the first anode in the first direction(that is, the width) is relatively small, and the distance between bodyportions of the first conductive portion and the second conductiveportion is relatively large, the symmetry of the first conductiveportion and the second conductive portion on both sides of the firstanode can be improved by disposing the foregoing heel block, therebyimproving the flatness of the first anode.

In some examples, the first light emitting element is configured to emitlight of a first color; the second light emitting element and the thirdlight emitting element are configured to emit light of a second color;and the fourth light emitting element is configured to emit light of athird color.

For example, the first color is red (R), the second color is green (G),and the third color is blue (B). That is, the display substrate uses apixel arrangement structure of GGRB.

An embodiment of the present disclosure provides a display device. FIG.8 is a schematic diagram of a display device according to an embodimentof the present disclosure. As shown in FIG. 8 , the display device 400includes any foregoing display substrate 100. Therefore, the displaydevice includes beneficial effects corresponding to the beneficialeffects of the display substrate. For example, in the display device,the flatness of the first anode located in the effective light emittingregion of the first light emitting element can be ensured, therebyavoiding the phenomenon of color cast; the resistance between the fourthanode located in the effective light emitting region of the fourth lightemitting element and the fourth connection electrode can be reduced, andthe distance between the first anode and the fourth anode can beincreased, to avoid short-circuiting between the first anode and thefourth anode due to residues left in the manufacturing process.

For example, the display device may be a display panel, or an electronicproduct that includes a display function, such as a TV, a computer, anotebook computer, a tablet computer, a mobile phone, a navigator, or anelectronic photo frame.

On the other hand, the inventor of this application finds that, becausethe thickness of the second source-drain metal layer below the anode isrelatively large and distribution of the thickness is uneven, the secondsource-drain metal layer also causes the anode to be uneven.

FIG. 9 is a partial schematic cross-sectional view of another displaysubstrate. FIG. 10 is a partial schematic cross-sectional view ofanother display substrate. As shown in FIG. 9 , the second source-drainmetal layer 160 includes a plurality of wires 168. If a wire 168 existson one side below the anode 175, and there is no wire 168 on the otherside, a difference between heights of the two sides of the anode 175occurs. Consequently, the anode 175 includes a phenomenon of“inclination”, which further leads to a phenomenon of color cast. Asshown in FIG. 10 , if wires 168 exist on both sides of the anode 175, ora wire 168 is not disposed below the anode 175, the anode 175 can ensurerelatively high flatness, to ensure that the light emitting intensitiesof the anode 175 in different directions are consistent, therebyeffectively improving the phenomenon of color cast.

Regarding this, the embodiments of the present disclosure provide adisplay substrate and a display device. The display substrate includes abase substrate, a first conductive layer, a first planarization layer, asecond conductive layer, a second planarization layer, and a pluralityof light emitting element groups. The first conductive layer is locatedon the base substrate. The first planarization layer is located on aside of the first conductive layer away from the base substrate. Thesecond conductive layer is located on a side of the first planarizationlayer away from the first conductive layer. The second planarizationlayer is located on a side of the second conductive layer away from thefirst planarization layer. The plurality of light emitting elementgroups are located on a side of the second planarization layer away fromthe second conductive layer. The plurality of light emitting elementgroups are arranged along a first direction to form a plurality of lightemitting element columns, and are arranged along a second direction toform a plurality of light emitting element rows. Each of the lightemitting element groups includes a first light emitting element, asecond light emitting element, a third light emitting element, and afourth light emitting element. The first light emitting element includesa first anode. The second conductive layer includes a first conductiveportion and a second conductive portion that extend along the seconddirection. The first conductive portion is located on a side of thefirst anode. The second conductive portion is located on a side of thefirst anode away from the first conductive portion. The first conductiveportion includes an extension portion and an offset portion. Theorthographic projection of the effective light emitting region of thefirst light emitting element on a straight line extending along thesecond direction is covered by the orthographic projection of the offsetportion on the straight line. The orthographic projection of the offsetportion on the base substrate is spaced from the orthographic projectionof the first anode on the base substrate. A straight line on which anedge of the extension portion that is close to the second conductiveportion and that extends along the second direction is located is afirst straight line. The offset portion is spaced from the firststraight line and is located on a side of the first straight line awayfrom the second conductive portion. Therefore, because the firstconductive portion is located on a side of the first anode, the secondconductive portion is located on a side of the first anode away from thefirst conductive portion, and the orthographic projection of the offsetportion on the base substrate is spaced from the orthographic projectionof the first anode on the base substrate, the first conductive portionand the second conductive portion in the second conductive layer haverelatively small impact on the flatness of the first anode, so that thefirst anode can ensure relatively high flatness, to ensure that lightemitting intensities of the first anode in different directions areconsistent, thereby effectively improving the phenomenon of color cast.

The display substrate and the display device that are provided in theembodiments of the present disclosure are described in detail below withreference to the accompanying drawings.

An embodiment of the present disclosure provides a display substrate.FIG. 11 is a schematic planar diagram of another display substrateaccording to an embodiment of the present disclosure. FIG. 12A is aschematic cross-sectional view of a display substrate according to anembodiment of the present disclosure along an HH direction in FIG. 11 .FIG. 12B is a schematic cross-sectional view of a display substrateaccording to an embodiment of the present disclosure along a JJdirection in FIG. 11 . FIG. 13 is a schematic planar diagram of anotherdisplay substrate according to an embodiment of the present disclosure.FIG. 14 is a schematic planar diagram of another display substrateaccording to an embodiment of the present disclosure. To clearly showthe location relationship between the conductive portions in the secondconductive layer and anodes, FIG. 14 shows only the second conductivelayer and an anode layer.

As shown in FIG. 11 to FIG. 14 , the display substrate 100 includes abase substrate 110, a first conductive layer 150, a first planarizationlayer 241, a second conductive layer 160, a second planarization layer242, and a plurality of light emitting element groups 310. The secondconductive layer 160 is located on the base substrate 110. The secondplanarization layer 242 is located on a side of the second conductivelayer 160 away from the base substrate 110. The plurality of lightemitting element groups 310 are located on a side of the secondplanarization layer 242 away from the base substrate 110. The pluralityof light emitting element groups 310 are arranged along a firstdirection to form a plurality of light emitting element columns 320, andare arranged along a second direction to form a plurality of lightemitting element rows 330. Each of the light emitting element groups 310includes a first light emitting element 311, a second light emittingelement 312, a third light emitting element 313, and a fourth lightemitting element 314. The first light emitting element 311 includes afirst anode 1751. The second light emitting element 312 includes asecond anode 1752. The third light emitting element 313 includes a thirdanode 1753. The fourth light emitting element 314 includes a fourthanode 1754. The second anode 1752 and the third anode 1753 are arrangedalong the second direction to form an anode pair 1755. The first anode1751, the anode pair 1755, and the fourth anode 1754 are arranged alongthe first direction. The second conductive layer 160 includes a firstconductive portion 1621 and a second conductive portion 1622 that extendalong the second direction. The first conductive portion 1621 is locatedon a side of the first anode 1751 away from the anode pair 1755. Thesecond conductive portion 1622 is located between the first anode 1751and the anode pair 1755, that is, a side of the first anode 1751 awayfrom the first conductive portion 1621. The first conductive portion1621 includes an extension portion 1621A and an offset portion 1621B.The orthographic projection of the effective light emitting region ofthe first light emitting element 311 on a straight line that extendsalong the second direction is covered by the orthographic projection ofthe offset portion 1621B on the straight line. That is, the orthographicprojection of the effective light emitting region of the first lightemitting element 311 on the first conductive portion 1621 is located atthe location of the offset portion 1621B. That is, the offset portion1621B corresponds to the effective light emitting region of the firstlight emitting element 311. The orthographic projection of the offsetportion 1621B on the base substrate 110 is spaced from the orthographicprojection of the first anode 1751 on the base substrate 110. A straightline on which an edge of the extension portion 1621A that is close tothe second conductive portion 1622 and that extends along the seconddirection is located is a first straight line 302. The offset portion1621B is spaced from the first straight line 302, and is located on aside of the first straight line 302 away from the second conductiveportion 1622. It should be noted that, the foregoing first conductivelayer and second conductive layer are sequentially stacked along adirection away from the base substrate.

In the display substrate provided in this embodiment of the presentdisclosure, because the first conductive portion is located on a side ofthe first anode, the second conductive portion is located on a side ofthe first anode away from the first conductive portion, and theorthographic projection of the offset portion on the base substrate isspaced from the orthographic projection of the first anode on the basesubstrate, the first conductive portion and the second conductiveportion in the second conductive layer have relatively small impact onthe flatness of the first anode, so that the first anode can ensurerelatively high flatness, to ensure that light emitting intensities ofthe first anode in different directions are consistent, therebyeffectively improving the phenomenon of color cast. In addition, becausethe offset portion is spaced from the first straight line and is locatedon a side of the first straight line away from the second conductiveportion, the offset portion is offset away from the first anode, toprovide space for disposing the first anode, so that relatively highflatness of the first anode can be ensured while dense arrangement ofanodes is implemented.

It should be noted that, for the arrangement manner of the plurality oflight emitting elements, reference may be made to the arrangement mannershown in FIG. 6 , that is, two adjacent light emitting element rows areoffset from each other by ½ pitch. The foregoing pitch is equal to adistance between centers of effective light emitting regions of twofirst light emitting elements in two light emitting element groups thatare adjacent in the first direction.

In some examples, the first light emitting element 311 is configured toemit light of a first color; the second light emitting element 312 andthe third light emitting element 313 are configured to emit light of asecond color; and the fourth light emitting element 314 is configured toemit light of a third color.

In some examples, the first color is red, the second color is green, andthe third color is blue.

In some examples, as shown in FIG. 11 to FIG. 14 , the orthographicprojection of the first straight line 302 on the base substrate 110 runsthrough the orthographic projection of the first anode 1751 on the basesubstrate 110. Therefore, in the display substrate, relatively highflatness of the first anode can be ensured while dense arrangement ofanodes is implemented.

In some examples, as shown in FIG. 11 to FIG. 14 , a straight line onwhich a bisector that is of the extension portion 1621A and that extendsalong the second direction is located is a second straight lines 303.The offset portion 1621B is spaced from the second straight line 303,and is located on a side of the second straight line 303 away from thesecond conductive portion 1622. Therefore, because the offset portion isspaced from the second straight line and is located on a side of thesecond straight line away from the anode pair, the offset portion isoffset away from the first anode, to provide space for disposing thefirst anode, so that relatively high flatness of the first anode can beensured while dense arrangement of anodes is implemented.

In some examples, as shown in FIG. 11 to FIG. 14 , the orthographicprojection of the second straight line 303 on the base substrate 110runs through the orthographic projection of the first anode 1751 on thebase substrate 110. Therefore, in the display substrate, relatively highflatness of the first anode can be ensured while dense arrangement ofanodes is implemented.

In some examples, as shown in FIG. 11 to FIG. 14 , the first anode 1751extends along the second direction, the second conductive portion 1622includes a body portion 1622A and a heel block 1622B that extend alongthe second direction, the orthographic projection of the body portion1622A on the base substrate 110 is spaced from the orthographicprojection of the first anode 1751 on the base substrate 110, the heelblock 1622B is located on a side of the body portion 1622A close to thefirst anode 1751, a distance between the orthographic projection of theheel block 1622B on the base substrate 110 and the orthographicprojection of a center of the effective light emitting region of thefirst light emitting element 311 on the base substrate 110 isapproximately equal to a distance between the orthographic projection ofthe first conductive portion 1621 on the base substrate 110 and theorthographic projection of the center of the effective light emittingregion of the first light emitting element 311 on the base substrate110.

In the display substrate, because usually, the size of the first anodein the first direction (that is, the width) is relatively small, thedistance between body portions of the first conductive portion and thesecond conductive portion is relatively large. Because the distancebetween the orthographic projection of the heel block on the basesubstrate and the orthographic projection of the center of the effectivelight emitting region of the first light emitting element on the basesubstrate is approximately equal to a distance between the orthographicprojection of the first conductive portion on the base substrate and theorthographic projection of the center of the effective light emittingregion of the first light emitting element on the base substrate, thesymmetry of the first conductive portion and the second conductiveportion on both sides of the first anode can be improved by disposingthe foregoing heel block, thereby improving the flatness of the firstanode.

In some examples, as shown in FIG. 11 to FIG. 14 , the distance betweenthe orthographic projection of the first conductive portion 1621 on thebase substrate 110 and the orthographic projection of the center of theeffective light emitting region of the first light emitting element 311on the base substrate 110 is less than a distance between theorthographic projection of the body portion 1622A on the base substrate110 and the orthographic projection of the center of the effective lightemitting region of the first light emitting element 311 on the basesubstrate 110.

For example, a ratio of the distance between the orthographic projectionof the first conductive portion 1621 on the base substrate 110 and theorthographic projection of the center of the effective light emittingregion of the first light emitting element 311 on the base substrate 110to the distance between the orthographic projection of the body portion1622A on the base substrate 110 and the orthographic projection of thecenter of the effective light emitting region of the first lightemitting element 311 on the base substrate 110 is less than or equal to⅓.

In some examples, as shown in FIG. 11 to FIG. 14 , the orthographicprojection of the heel block 1622B on the base substrate 110 is spacedfrom the orthographic projection of the body portion 1622A on the basesubstrate 110. The second conductive portion 1622 further includes aconductive portion 1622C. The heel block 1622B is connected to the bodyportion 1622A through the conductive portion 1622C. Therefore, becausethe heel block 1622B is connected to the body portion 1622A through theconnection portion 1622C, and is not integrally formed with the bodyportion 1622A, the second conductive portion 1622 can be prevented fromoverlapping too much with a film below, such as a semiconductor layer ora gate electrode layer, thereby preventing increasing the load of thefilm below the second conductive portion 1622. Therefore, in the displaysubstrate, normal work of the sub-pixels can be ensured while a heelblock is added.

For example, as shown in FIG. 12B, the first conductive layer 150includes a power line 151, a data line 152, a first connection block1541, and a second connection block 1542 that extend along the seconddirection. The first connection block 1541 is configured to connect aninitialization signal line to a corresponding source region in a pixeldriving circuit. The second connection block 1542 is configured toconnect a drain region of a compensating thin film transistor to a firstelectrode block CE1. The first electrode block CE1 may form a storagecapacitor with a second electrode block CE2, and is also used as a gateelectrode of a drive thin film transistor. Therefore, because the heelblock 1622B is connected to the body portion 1622A through theconnection portion 1622C and is not integrally formed with the bodyportion 1622A, the second conductive portion 1622 can be prevented fromoverlapping too much with the second connection block 1542, to reducethe load of the second connection block 1542, that is, the load of thedrain electrode of the compensating thin film transistor and the load ofthe gate electrode of the drive thin film transistor, to further improvethe performance of the display substrate. It should be noted that, thedisplay substrate uses a 7T1C pixel driving circuit. Certainly, thisembodiment of the present disclosure includes but is not limitedthereto. The display substrate may use another proper pixel drivingcircuit structure.

For example, as shown in FIG. 12B, the orthographic projection of theoffset portion 1621B on the base substrate 110 is spaced from theorthographic projection of the first anode 1751 on the base substrate,and the orthographic projection of the heel block 1622B on the basesubstrate 110 is spaced from the orthographic projection of the firstanode 1751 on the base substrate 110. For example, as shown in FIG. 12B,the display substrate may further include a passivation layer 364,located between the first conductive layer 150 and the firstplanarization layer 241. Certainly, this embodiment of the presentdisclosure includes but is not limited thereto. Alternatively, apassivation layer may not be disposed on the display substrate.

In some examples, as shown in FIG. 11 to FIG. 14 , the distance betweenthe orthographic projection of the heel block 1622B on the basesubstrate 110 and the orthographic projection of the body portion 1622Aon the base substrate 110 is greater than a width of the orthographicprojection of the heel block 1622B on the base substrate 110 along thefirst direction. Therefore, in the display substrate, the secondconductive portion 1622 can be further prevented from overlapping toomuch with a film below, such as a semiconductor layer or a gateelectrode layer, thereby preventing increasing the load of the film suchas the semiconductor layer or the gate electrode layer. Therefore, inthe display substrate, normal work of the sub-pixels can be ensuredwhile a heel block is added.

In some examples, as shown in FIG. 11 to FIG. 14 , the second conductiveportion 1622 includes two connection portions 1622C. The two connectionportions 1622C are respectively located on two ends of the heel block1622B in the second direction. The heel block 1622B, the two connectionportions 1622C, and the body portion 1622A enclose a rectangularopening. Therefore, in the display substrate, the second conductiveportion 1622 can be further prevented from overlapping too much with afilm below, such as a semiconductor layer or a gate electrode layer,thereby preventing increasing the load of the film such as thesemiconductor layer or the gate electrode layer. Therefore, in thedisplay substrate, normal work of the sub-pixels can be ensured while aheel block is added.

In some examples, a ratio of the width of the heel block in the firstdirection to the width of the body portion in the first direction isless than or equal to ½, and a ratio of the width of the heel block inthe first direction to the distance between the body portion and theheel block is less than or equal to ½.

In some examples, a ratio of the length of the heel block in the seconddirection to the length of the effective light emitting region of thefirst light emitting element in the second direction is greater than orequal to ⅞.

In some examples, an angle between the first direction and a lineconnecting centers of the effective light emitting region of the firstlight emitting element and the heel block is less than 30 degrees. Forexample, the angle between the first direction and the line connectingthe centers of the effective light emitting region of the first lightemitting element and the heel block is zero. That is, the lineconnecting the centers of the effective light emitting region of thefirst light emitting element and the heel block is parallel to the firstdirection.

In some examples, the orthographic projection of the heel block on thebase substrate is spaced from the orthographic projection of the firstanode on the base substrate, and the orthographic projection of thefirst conductive portion on the base substrate is spaced from theorthographic projection of the first anode on the base substrate.

In some examples, an area in which the orthographic projection of theheel block on the base substrate is overlapped with the orthographicprojection of the first anode on the base substrate is approximatelyequal to an area in which the orthographic projection of the firstconductive portion on the base substrate is overlapped with theorthographic projection of the first anode on the base substrate. Insome examples, as shown in FIG. 11 to FIG. 14 , the second conductivelayer 160 further includes a third conductive portion 1623 and a fourthconductive portion 1624 that extend along the second direction. Thethird conductive portion 1623 is located between the anode pair 1755 andthe fourth anode 1754. The fourth conductive portion 1624 is overlappedwith the fourth anode 1754.

In some examples, as shown in FIG. 11 to FIG. 14 , the distance betweenthe orthographic projection of the body portion 1622A of the secondconductive portion 1622 on the base substrate 110 and the orthographicprojection of the effective light emitting region of the second lightemitting element 312 on the base substrate 110 along the bisector in thesecond direction is approximately equal to the distance between theorthographic projection of the third conductive portion 1623 on the basesubstrate 110 and the orthographic projection of the effective lightemitting region of the second light emitting element 312 on the basesubstrate 110 along the bisector in the second direction. Therefore, thedisplay substrate can improve the symmetry of the second conductiveportion and the third conductive portion on two sides of the anode pair,thereby improving the flatness of the second and the third anode.

In some examples, as shown in FIG. 11 to FIG. 14 , the fourth anode 1754extends along the second direction, and the orthographic projection ofthe fourth conductive portion 1624 on the base substrate 110 runsthrough a center of the orthographic projection of the effective lightemitting region of the fourth light emitting element 314 on the basesubstrate 110. Therefore, although the fourth conductive portion 1624 isoverlapped with the fourth anode 1754, because the orthographicprojection of the fourth conductive portion 1624 on the base substrate110 runs through the center of the orthographic projection of theeffective light emitting region of the fourth light emitting element 314on the base substrate 110, the fourth conductive portion can ensure thatthe fourth anode includes relatively high flatness, to ensure that lightemitting intensities of the fourth anode in different directions areconsistent, thereby effectively improving the phenomenon of color cast.

In some examples, as shown in FIG. 11 to FIG. 14 , the second conductivelayer 160 further includes a fifth conductive portion 1625 and a sixthconductive portion 1626 that extend along the first direction. The fifthconductive portion 1625 is separately connected to the body portion1622A and the third conductive portion 1623, and is located between thesecond anode 1752 and the third anode 1753 in the anode pair 1755. Thesixth conductive portion 1626 is separately connected to the thirdconductive portion 1623 and the fourth conductive portion 1624, and islocated between the first anode 1751 and the fourth anode 1754 that areadjacent in the second direction. Therefore, the foregoing firstconductive portion 1621, second conductive portion 1622, thirdconductive portion 1623, fourth conductive portion 1624, fifthconductive portion 1625, and sixth conductive portion 1626 may form areticular structure, to further reduce the resistance of the power linein the first conductive layer, and further improve the electricperformance of the display substrate.

In some examples, as shown in FIG. 11 to FIG. 14 , the second conductivelayer 160 includes a first connection electrode 1611, a secondconnection electrode 1612, a third connection electrode 1613, and afourth connection electrode 1614. The second planarization layer 242includes a first via hole 2421, a second via hole 2422, a third via hole2423, and a fourth via hole 2424. The first anode 1751 is connected tothe first connection electrode 1611 through the first via hole 2421. Thesecond anode 1752 is connected to the second connection electrode 1612through the second via hole 2422. The third anode 1753 is connected tothe third connection electrode 1613 through the third via hole 2423. Thefourth anode 1754 is connected to the fourth connection electrode 1614through the fourth via hole 2424.

In some examples, as shown in FIG. 11 to FIG. 14 , the firstplanarization layer 241 is located on a side of the second conductivelayer 160 close to the base substrate 110, and the first conductivelayer 150 is located on a side of the first planarization layer 241close to the base substrate 110. The first conductive layer 150 includesa first drain electrode 1511, a second drain electrode 1512, a thirddrain electrode 1513, and a fourth drain electrode 1514. The firstplanarization layer 241 includes a fifth via hole 2415, a sixth via hole2416, a seventh via hole 2417, and an eighth via hole 2418. The firstconnection electrode 1611 is connected to the first drain electrode 1511through the fifth via hole 2415. The second connection electrode 1612 isconnected to the second drain electrode 1512 through the sixth via hole2416. The third connection electrode 1613 is connected to the thirddrain electrode 1513 through the seventh via hole 2417. The fourthconnection electrode 1614 is connected to the fourth drain electrode1514 through the eighth via hole 2418.

In some examples, as shown in FIG. 11 to FIG. 14 , the display substrate100 further includes a first pixel driving circuit 2651, a second pixeldriving circuit 2652, a third pixel driving circuit 2653, and a fourthpixel driving circuit 2654. The first drain electrode 1511 is a part ofthe first pixel driving circuit 2651. The second drain electrode 1512 isa part of the second pixel driving circuit 2652. The third drainelectrode 1513 is a part of the third pixel driving circuit 2653. Thefourth drain electrode 1514 is a part of the fourth pixel drivingcircuit 2654. The first pixel driving circuit 2651 is connected to thefirst anode 1751 through the first connection electrode 1611, to apply adrive signal to the first anode 1751. The second pixel driving circuit2652 is connected to the second anode 1752 through the second connectionelectrode 1612, to apply a drive signal to the second anode 1752. Thethird pixel driving circuit 2653 is connected to the third anode 1753through the third connection electrode 1613, to apply a drive signal tothe third anode 1753. The fourth pixel driving circuit 2654 is connectedto the fourth anode 1754 through the fourth connection electrode 1614,to apply a drive signal to the fourth anode 1754.

For example, the thickness of the second conductive layer may range from0.6 microns to 0.8 microns, such as 0.7 microns, and the thickness ofthe second planarization layer may range from 1.3 microns to 1.7microns, such as 1.5 microns.

FIG. 15 is a schematic planar diagram of another display substrateaccording to an embodiment of the present disclosure. To clearly showthe location relationship between the conductive portions in the secondconductive layer and anodes, FIG. 15 shows only the second conductivelayer and an anode layer. As shown in FIG. 15 , the second conductiveportion 1622 of the second conductive layer 160 is not provided with aheel block. The first conductive portion 1621 of the second conductivelayer 160 includes an extension portion 1621A and an offset portion1621B. The orthographic projection of the effective light emittingregion of the first light emitting element 311 on the first conductiveportion 1621 is located at the location of the offset portion 1621B.That is, the offset portion 1621B corresponds to the effective lightemitting region of the first light emitting element 311. Theorthographic projection of the offset portion 1621B on the basesubstrate 110 is spaced from the orthographic projection of the firstanode 1751 on the base substrate 110. A straight line on which an edgeof the extension portion 1621A that is close to the first anode 1751 andthat extends along the second direction is located is a first straightline 302. The offset portion 1621B is spaced from the first straightline 302, and is located on a side of the first straight line 302 awayfrom the anode pair 1755.

In the display substrate provided in this embodiment of the presentdisclosure, because the first conductive portion is located on a side ofthe first anode away from the anode pair, the second conductive portionis located between the first anode and the anode pair, and theorthographic projection of the offset portion on the base substrate isspaced from the orthographic projection of the first anode on the basesubstrate, the first conductive portion and the second conductiveportion in the second conductive layer have relatively small impact onthe flatness of the first anode, so that the first anode can ensurerelatively high flatness, to ensure that light emitting intensities ofthe first anode in different directions are consistent, therebyeffectively improving the phenomenon of color cast. In addition, becausethe offset portion is spaced from the first straight line and is locatedon a side of the first straight line away from the anode pair, theoffset portion is offset away from the first anode, to provide space fordisposing the first anode, so that relatively high flatness of the firstanode can be ensured while dense arrangement of anodes is implemented.

For example, as shown in FIG. 15 , the first anode 1751 may include abody portion 1751A, a connection portion 1751B, and a supplementingportion 1751C. The effective light emitting region of the first lightemitting element falls into the body portion 1751A. The connectionportion 1751B is configured to connect the first anode 1751 to acorresponding one of the plurality of pixel driving circuits. Thesupplementing portion 1751C can cover electric potentials on a gateelectrode G1 in a drive thin film transistor T1 and a drain D3 of acompensating thin film transistor T3 in the corresponding one of thepixel driving circuits, to stabilize the electric potentials on the gateelectrode G1 of the drive thin film transistor T1 and the drain D3 ofthe compensating thin film transistor T3, thereby improving thelong-term light emission stability and the service life of the displaysubstrate.

For example, as shown in FIG. 15 , a distance between the first anode1751 and the offset portion 1621B may range from 2.5 microns to 3.2microns, such as 2.9 microns. A distance between the body portion 1751Aof the first anode 1751 and the second conductive portion 1622 may rangefrom 9 microns to 11 microns, such as 10.5 microns. A distance betweenthe connection portion 1751B of the first anode 1751 and the secondconductive portion 1622 may range from 5 microns to 7 microns. Thesupplementing portion 1751C of the first anode 1751 may be partiallyoverlapped with the second conductive portion 1622, and the width of theoverlapping part in the first direction is less than 1 micron, such as0.79 microns. Because an edge of the supplementing portion close to thesecond conductive portion is relatively far away from the body portion,partial overlapping between the supplementing portion 1751C and thesecond conductive portion 1622 includes relatively small impact on theflatness of the first anode.

An embodiment of the present disclosure provides a display device. FIG.16 is a schematic diagram of a display device according to an embodimentof the present disclosure. As shown in FIG. 16 , the display device 400includes any foregoing display substrate 100. Therefore, the displaydevice includes beneficial effects corresponding to the beneficialeffects of the display substrate. For example, in the display device,the flatness of the first anode located in the effective light emittingregion of the first light emitting element can be ensured, therebyavoiding the phenomenon of color cast; the resistance between the fourthanode located in the effective light emitting region of the fourth lightemitting element and the fourth connection electrode can be reduced, andthe distance between the first anode and the fourth anode can beincreased, to avoid short-circuiting between the first anode and thefourth anode due to residues left in the manufacturing process.

For example, the display device may be an electronic product thatincludes a display function, such as a TV, a computer, a notebookcomputer, a tablet computer, a mobile phone, a navigator, or anelectronic photo frame.

In the process of manufacturing an OLED display device, an evaporationprocess is usually adopted to manufacture an organic material layer. Inaddition, to prevent the FMM from touching and damaging an OLED displaysubstrate in the evaporation process, a spacer usually needs to beformed on the OLED display substrate, and the FMM is placed on thespacer. In this case, the spacer can support the FMM, so as to protectthe OLED display substrate.

However, in the research, the inventor of this application notices that,usually, the spacer is located at an intermediate location of a straightedge of an effective light emitting region of a sub-pixel; when theevaporation process is performed by using the FMM, an opening edge ofthe FMM is located at an intermediate location of the spacer; theintermediate location of the spacer is usually a location at which thethickness of the spacer is the largest (namely, a top end of the spacer)due to the preparation process thereof and other reasons, and theopening edge of the FMM exactly comes into contact with the top end ofthe spacer, and consequently easily scratches the spacer and foreignbodies such as particles are generated. FIG. 17 is a schematic diagramof an evaporation process by using an FMM. As shown in FIG. 17 , anopening edge 252 of an FMM 250 is located on a top end of a spacer 220,and easily scratches the top end of the spacer 200, and foreign bodiessuch as particles are generated. After an evaporation process, a filmsuch as a packaging layer is formed on a display substrate, and thegenerated foreign bodies such as particles easily cause the packaginglayer to be in an unfavorable condition, such as generate cracks,resulting in decrease in the stability and reliability of the product.

With regard to this, the embodiments of the present disclosure furtherprovide a display substrate, a manufacturing method thereof and adisplay device. The display substrate includes a substrate, a lightemitting layer and a spacer; the light emitting layer is located on thebase substrate and includes a plurality of light emitting portions; thespacer is located at a side of the light emitting layer away from thebase substrate; an orthographic projection of a top end of the spacer onthe base substrate and an edge of an orthographic projection of thelight emitting portion on the base substrate are arranged at intervals.Therefore, when the fine metal mask plate is used for vapor depositionprocess to form the light emitting portion, the orthographic projectionof the opening edge of the fine metal mask plate on the base substrateand the orthographic projection of the top end of the spacer on the basesubstrate are arranged at intervals, so that the contact between theopening edge of the fine metal mask plate and the top end of the spacercan be avoided, and foreign matters such as particles can be avoided,thereby improving the yield of the display substrate.

Hereinafter, the display substrate, the manufacturing method thereof andthe display device according to the embodiments of the presentdisclosure will be described in detail with reference to the drawings.

An embodiment of the present disclosure provides a display substrate.FIG. 18 is a schematic plan view of a display substrate according to anembodiment of the present disclosure; FIG. 19 is a schematic sectionview of a display substrate according to an embodiment of the presentdisclosure along the CC direction in FIG. 18 .

As illustrated in FIGS. 18 and 19 , the display substrate 100 includes abase substrate 110, a light emitting layer 180 and a spacer 220. Thelight emitting layer 180 is located on the base substrate 110 andincludes a plurality of light emitting portions 185; the spacer 220 islocated at the side of the base substrate 110 where the light emittinglayer 180 is located. The orthographic projection of the top end 225 ofthe spacer 220 on the base substrate 110 and the edge of theorthographic projection of the light emitting portion 185 on the basesubstrate 110 are arranged at intervals. It should be noted that the topend of the spacer mentioned above refers to the part of the spacer awayfrom the base substrate, that is, the part with greater thickness; inaddition, the above-mentioned “arranged at intervals” means that theorthographic projection of the top end of the spacer away from the basesubstrate on the base substrate and the orthographic projection of thelight emitting portion on the base substrate have a certain interval anddo not overlap or contact each other.

In the manufacturing process of the display substrate according to theembodiment of the present disclosure, when the light emitting portion185 is formed by vapor deposition using the fine metal mask plate 250,as illustrated in FIG. 19 , the orthographic projection of the openingedge 252 of the fine metal mask plate 250 on the base substrate 110 isspaced from the orthographic projection of the top end 225 of the spacer220 on the base substrate 110, therefore, the opening edge 252 of thefine metal mask plate 250 can be prevented from contacting the top end225 of the spacer 220, and foreign matters such as particles can beavoided. For example, as illustrated in FIG. 19 , the opening edge 252of the fine metal mask plate 250 is located at the edge portion of thespacer 220, because the thickness of the edge portion of the spacer 220is less than the thickness of the top end 225 of the spacer 220, theopening edge 252 of the fine metal mask plate 250 is in a suspendedstate and has no contact with the spacer 220, thus avoiding thegeneration of foreign matters such as particles due to scraping.Therefore, the display substrate can improve the stability andreliability of the display substrate and the yield of products.

In some examples, as illustrated in FIG. 19 , the size of the middleportion of the spacer 220 in the direction perpendicular to the basesubstrate 110 is greater than the size of the edge portion of the spacer220 in the direction perpendicular to the base substrate 110. That is,the thickness of the middle portion of the spacer 220 is greater thanthe thickness of the edge portion of the spacer 220. Therefore, when theorthographic projection of the opening edge of the fine metal mask plateon the base substrate and the orthographic projection of the middleportion of the spacer (i.e., the top end of the spacer) on the basesubstrate are arranged at intervals, the opening edge of the fine metalmask plate can be in a suspended state without contacting with thespacer, thereby avoiding the generation of foreign matters such asparticles due to scraping.

For example, as illustrated in FIG. 19 , the shape of a section of thespacer 220 cut by a plane perpendicular to the base substrate 110 caninclude a semicircle. Of course, embodiments of the present disclosureinclude but are not limited to this. For example, when the shape of thesection of the spacer 220 is a semicircle, the slope angle of thesemicircle ranges from 8 to 10 degrees.

In some examples, as illustrated in FIG. 18 , the shape of theorthographic projection of the spacer 220 on the base substrate 110 isrectangular, and the orthographic projection of the central axis of thespacer 220 in the length direction on the base substrate 110 is spacedfrom the edge of the orthographic projection of the light emittingportion 185 on the base substrate 110. Therefore, the display substratecan avoid the contact between the opening edge of the fine metal maskplate and the top end of the spacer, and avoid the generation of foreignmatters such as particles, thereby improving the stability andreliability of the display substrate and the yield of products. Ofcourse, the shape of the orthographic projection of the spacer on thebase substrate in the embodiment of the present disclosure includes butis not limited to the rectangle described above, and can also be othershapes.

In some examples, as illustrated in FIG. 18 , the distance between theorthographic projection of the central axis of the spacer 220 in thelength direction on the base substrate 110 and the edge of theorthographic projection of the light emitting portion 185 on the basesubstrate 110 is greater than 6 microns. Therefore, the displaysubstrate can effectively avoid the contact between the opening edge ofthe fine metal mask plate and the top end of the spacer, and avoid thegeneration of foreign matters such as particles, thereby improving thestability and reliability of the display substrate and the yield ofproducts.

FIG. 20 is a schematic plan view of another display substrate accordingto an embodiment of the present disclosure; FIG. 21 is a schematicsection view of a display substrate along DD direction in FIG. 20according to an embodiment of the present disclosure. In order toclearly illustrate the relationship between the spacer and the lightemitting portion, only the base substrate, the anode layer, the lightemitting layer and the spacer are illustrated in FIG. 20 . Asillustrated in FIG. 20 , the orthographic projection of the top end 225of the spacer 220 away from the base substrate 110 on the base substrate110 and the orthographic projection of the light emitting portion 185 onthe base substrate 110 are arranged at intervals. As illustrated in FIG.21 , when the fine metal mask plate is used for vapor deposition to formthe above-mentioned light emitting portion, the opening edge 252 of thefine metal mask plate 250 is in a suspended state without contactingwith the spacer 220. Therefore, the display substrate can avoid thecontact between the opening edge of the fine metal mask plate and thetop end of the spacer, and avoid the generation of foreign matters suchas particles, thereby further improving the stability and reliability ofthe display substrate and the yield of products.

In some examples, as illustrated in FIG. 20 , the plurality of lightemitting portions 185 include a plurality of light emitting groups 1850,the plurality of light emitting groups 1850 are arranged in a firstdirection to form a plurality of light emitting group columns 280 andarranged in a second direction to form a plurality of light emittinggroup rows 290; each light emitting group 1850 includes a first lightemitting portion 1851, a second light emitting portion 1852, a thirdlight emitting portion 1853 and a fourth light emitting portion 1854.Two adjacent light emitting group rows 290 are arranged at a ½ pitchoffset, and the pitch is equal to the distance between the centers oftwo first light emitting portions 1851 in two adjacent light emittinggroups 1850 in the first direction; the second light emitting portion1852 and the third light emitting portion 1853 are arranged along thesecond direction to form a light emitting pair 1855, and the first lightemitting portion 1851, the light emitting pair 1855 and the fourth lightemitting portion 1854 are arranged along the first direction. Asillustrated in FIG. 20 , the orthographic projection of the top end 225of the spacer 220 on the base substrate 110 is located between theorthographic projection of the first light emitting portion 1851 and thethird light emitting portion 1853 in one light emitting group 1850 onthe base substrate 110, and the orthographic projection of the secondlight emitting portion 1852 and the fourth light emitting portion 1854in another light emitting group 1850 adjacent in the second direction onthe base substrate 110. Therefore, the display substrate can ensure thatthe orthographic projection of the top end 225 of the spacer 220 on thebase substrate 110 and the orthographic projection of the first lightemitting portion 1851, the second light emitting portion 1852, the thirdlight emitting portion 1853 and the fourth light emitting portion 1854on the base substrate 110 are arranged at intervals, and make full useof the space of the display substrate.

For example, the first direction and the second direction aresubstantially perpendicular. It should be noted that the first directionand the second direction being substantially perpendicular includes thecase where the included angle between the first direction and the seconddirection is 90 degrees, and also includes the case where the includedangle between the first direction and the second direction ranges from85 to 95 degrees.

For example, as illustrated in FIG. 20 , in the display substrate 100,two adjacent light emitting groups 1850 in the second direction can be afirst light emitting group 1850A and a second light emitting group1850B, the orthographic projection of the top end 225 of the spacer 220on the base substrate 110 is located between the orthographic projectionof the first light emitting portion 1851 of the first light emittinggroup 1850A on the base substrate 110, the orthographic projection ofthe third light emitting portion 1853 of the first light emitting group1850A on the base substrate 110, the orthographic projection of thesecond light emitting portion 1852 of the second light emitting group1850B on the base substrate 110 and the orthographic projection of thefourth light emitting of the second light emitting group 1850B on thebase substrate 110. Therefore, the display substrate can ensure that theorthographic projection of the top end 225 of the spacer 220 on the basesubstrate 110 and the orthographic projection of the first lightemitting portion 1851, the second light emitting portion 1852, the thirdlight emitting portion 1853 and the fourth light emitting portion 1854on the base substrate 110 are all arranged at intervals, and make fulluse of the space of the display substrate.

For example, the orthographic projection of the spacer 220 on the basesubstrate 110 can be a rectangle with a length of 20 microns and a widthof 9.5 microns. At this time, the distance between the orthographicprojection of the spacer 220 on the base substrate 110 and theorthographic projection of the third anode 1753 of the first lightemitting group 1850A on the base substrate 110 can range from 8.5 to 9.5microns, for example, 8.9 microns. The distance between the orthographicprojection of the spacer 220 on the base substrate 110 and theorthographic projection of the fourth anode 1754 of the second lightemitting group 1850B on the base substrate 110 can range from 6 to 7microns, for example, 6.3 microns.

For example, the distance between the orthographic projection of thespacer 220 on the base substrate 110 and the orthographic projection ofthe third light emitting portion 1853 of the first light emitting group1850A on the base substrate 110 can be 0 microns, or even overlap witheach other. The distance between the orthographic projection of thespacer 220 on the base substrate 110 and the orthographic projection ofthe second light emitting portion 1852 of the second light emittinggroup 1850B on the base substrate 110 can be 0 microns, or even overlapwith each other.

In some examples, as illustrated in FIGS. 20 and 21 , the displaysubstrate 100 further includes an anode layer 170 and a pixel defininglayer 190; the anode layer 170 is located between the base substrate 110and the spacer 220, and the pixel defining layer 190 is located at aside of the anode layer 170 close to the spacer 220. The anode layer 170includes a plurality of anodes 175, and the pixel defining layer 190includes a plurality of openings 195 to expose the plurality of anodes175. The plurality of anodes 175 are arranged corresponding to theplurality of light emitting portions 185, the plurality of openings 195are arranged corresponding to the plurality of light emitting portions185, the plurality of openings 195 include a plurality of opening groups1950, each opening group 1950 includes a first opening 1951, a secondopening 1952, a third opening 1953 and a fourth opening 1954, and theplurality of anodes 175 are arranged corresponding to the plurality oflight emitting portions 185. The plurality of anodes 175 includes aplurality of anode groups 1750, and each anode group 1750 includes afirst anode 1751, a second anode 1752, a third anode 1753 and a fourthanode 1754. The first light emitting portion 1851 is at least partiallylocated in the first opening 1951 and covers the first anode 1751 beingexposed, the second light emitting portion 1852 is at least partiallylocated in the second opening 1952 and covers the second anode 1752being exposed, the third light emitting portion 1853 is at leastpartially located in the third opening 1953 and covers the third anode1753 being exposed, and the fourth light emitting portion 1854 is atleast partially located in the fourth opening 1954 and covers the fourthanode 1753 being exposed.

For example, as illustrated in FIGS. 20 and 21 , the orthographicprojection of the spacer 220 on the base substrate 110 can partiallyoverlap with the orthographic projection of the first anode 1751 on thebase substrate 110.

For example, as illustrated in FIGS. 20 and 21 , a first virtualstraight line is parallel to the length direction of the spacer 220 andpasses through the center of the spacer 220; the shape of theorthographic projection of the first opening 1951 on the base substrate110 is approximately of an ellipse, and the ratio of the distancebetween the apex of the ellipse in the long axis direction and the firstvirtual straight line and the shortest distance between the firstopening 1951 and the first virtual straight line ranges from 1.5 to 1.

For example, the distance between the first opening 1951 and the secondopening 1952 ranges from 20 to 25 microns; the distance between thefirst opening 1951 and the third opening 1953 also ranges from 20 to 25microns. The distance between the first opening 1951 and the fourthopening 1954 also ranges from 20 to 25 microns. Of course, theembodiments of the present disclosure include but are not limited tothis, and the distance between different openings can be determinedaccording to the actual product size.

In some examples, as illustrated in FIGS. 20 and 21 , the orthographicprojection of the spacer 220 on the base substrate 110 and the pad blockof the first opening 1951 on the base substrate 110 are offset arranged.Therefore, in the manufacturing process of the display substrateaccording to the embodiment of the present disclosure, when the finemetal mask plate is used for vapor deposition to form theabove-mentioned light emitting portion, the display substrate can avoidthe contact between the opening edge of the fine metal mask plate andthe top end of the spacer, and avoid the generation of foreign matterssuch as particles.

For example, as illustrated in FIGS. 20 and 21 , the orthographicprojection of the spacer 220 on the base substrate 110 and theorthographic projection of the first opening 1951 on the base substrate110 are arranged at intervals.

In some examples, as illustrated in FIGS. 20 and 21 , the shape of theorthographic projection of the first opening 1951 on the base substrate110 is approximately elliptical, and the shape of the orthographicprojection of the spacer 220 on the base substrate 110 is rectangular.The included angle between the long axis direction of the shape of theorthographic projection of the first opening 1951 on the base substrate110 and the extending direction of the shape of the orthographicprojection of the spacer 220 on the base substrate 110 ranges from 20 to70 degrees.

In some examples, as illustrated in FIGS. 20 and 21 , the displaysubstrate 100 further includes a pixel circuit layer 260; the pixelcircuit layer 260 is located at a side of the anode layer 170 close tothe base substrate 110, and includes a plurality of pixel drivingcircuits 265; the plurality of pixel driving circuits 265 and theplurality of anodes 175 are arranged correspondingly, each anode 175 iselectrically connected with the corresponding pixel driving circuit 265,the first anode 1751 includes a body portion 1751A and a connectingportion 1751B connected with the body portion 1751A. The orthographicprojection of the first opening 1951 on the base substrate 110 fallswithin the orthographic projection of the body portion 1751A on the basesubstrate 110, and the connection portion 1751B is electricallyconnected with the corresponding pixel driving circuit 265.

In some examples, as illustrated in FIGS. 20 and 21 , the orthographicprojection of the spacer 220 on the base substrate 110 at leastpartially overlaps with the orthographic projection of the connectingportion 1751B on the base substrate 110. Therefore, the displaysubstrate can avoid the contact between the opening edge of the finemetal mask plate and the top end of the spacer, and avoid the generationof foreign matters such as particles, and make full use of the space ofthe display substrate.

In some examples, as illustrated in FIGS. 20 and 21 , the connectionportion 1751B is located at a position where the body portion 1751A isclose to the third anode 1753 in the same light emitting group 1850 andthe fourth anode 1754 in the light emitting group 1850 adjacent in thesecond direction.

In some examples, the region defined by the first opening 1951 is thefirst effective light emitting region of the first sub-pixel, the regiondefined by the second opening 1952 is the second effective lightemitting region of the second sub-pixel, the region defined by the thirdopening 1953 is the third effective light emitting region of the thirdsub-pixel, and the region defined by the fourth opening 1954 is thefourth effective light emitting region of the fourth sub-pixel.Therefore, the plurality of light emitting groups, the plurality ofopening groups and the plurality of anode groups above-mentionedrespectively correspond to a plurality of pixel structures.

In some examples, the first light emitting portion is configured to emitlight of a first color, the second light emitting portion is connectedwith the third light emitting portion and both configured to emit lightof a second color, and the fourth light emitting portion is configuredto emit light of a third color.

For example, the first color is red (R), the second color is green (G),and the third color is blue (B). That is, the display substrate adoptsthe pixel arrangement structure of GGRB.

FIG. 22 is a schematic section view of a display substrate along the EEdirection in FIG. 20 . As illustrated in FIG. 22 , in the actualmanufacturing process, the light emitting portions 185 (e.g., the firstlight emitting layer 1851 and the fourth light emitting layer 1854)formed by the fine metal mask plate will diffuse to form thinnerdiffusion portions (e.g., the diffusion portions 1851A and 1854A),resulting in the size of the finally obtained light emitting layer 185being greater than the opening size of the fine metal mask plate, whichwill overlap with the spacer 220, and even the adjacent light emittingportions will contact or overlap. At this time, the above-mentionedlight emitting layer refers to the part where the thickness of the lightemitting layer is greater than or equal to the thickness of thediffusion portion, and does not include the diffusion portion.

An embodiment of the present disclosure further provides a displaydevice. FIG. 23 is a schematic diagram of a display device according toan embodiment of the present disclosure. As illustrated in FIG. 23 , thedisplay device 400 includes any one of the display substrates 100described above. Therefore, the display device has the beneficialeffects corresponding to the beneficial effects of the displaysubstrate. For example, the display device can avoid the contact betweenthe opening edge 252 of the fine metal mask plate and the top end of thespacer in the manufacturing process, and avoid the generation of foreignmatters such as particles, thereby improving the stability andreliability of the display substrate and the yield of products.

For example, the display device can be electronic products with displayfunctions such as televisions, computers, notebook computers, flatcomputers, mobile phones, navigators, and electronic photo frames.

An embodiment of the present disclosure provides a method formanufacturing a display substrate. FIG. 24 shows a method formanufacturing a display substrate according to an embodiment of thepresent disclosure. As shown in FIG. 24 , the method for manufacturing adisplay substrate includes the following steps S101 to S103.

Step S101: forming a pixel defining layer on a base substrate, the pixeldefining layer including a plurality of openings.

For example, the base substrate may use a quartz substrate, a glasssubstrate, a plastic substrate, or the like. The pixel defining layermay be manufactured by using a vapor deposition process. The pluralityof openings may be manufactured by using an etching process. Certainly,this embodiment of the present disclosure includes but is not limitedthereto.

Step S102: forming a spacer on a side of the pixel defining layer awayfrom the base substrate.

For example, the spacer and the pixel defining layer may be formed byusing the same film through a half tone mask or a gray tone mask, toreduce mask processes, thereby reducing costs. For example, a layerstructure used for forming the pixel defining layer and the spacer maybe first formed on the base substrate; then a first photoresist patternis formed on a side of the layer structure away from the base substrateby using the half tone mask or the gray tone mask. The first photoresistpattern includes a completely kept portion, a partially kept portion,and a completely removed portion. The layer structure is etched (forexample, a wet etching process) by using the first photoresist pattern,and a layer structure corresponding to the completely removed part isremoved, to form a plurality of openings of the pixel defining layer.Then, an ashing process is performed on the first photoresist pattern,and the partially kept portion is removed to form a second photoresistpattern. The layer structure is further etched by using the secondphotoresist pattern, to form the spacer at a layer structurecorresponding to the completely kept portion, and form the pixeldefining layer at a layer structure corresponding to the partially keptportion. Certainly, this embodiment of the present disclosure includesbut is not limited thereto. The spacer may alternatively be formedseparately.

Step S103: placing a mask plate on a side of the spacer away from thebase substrate, and evaporating light emitting materials into theplurality of openings with the mask plate as a mask to form a lightemitting layer including a plurality of light emitting portions, themask plate includes a plurality of mask openings, and the orthographicprojection of the top end of the spacer on the base substrate and theedge of the orthographic projection of the mask opening on the basesubstrate are arranged at intervals.

In the manufacturing process of the display substrate according to theembodiment of the present disclosure, when a mask plate is placed on theside of the spacer away from the base substrate and light emittingmaterials are evaporated in the plurality of openings with the maskplate as a mask to form a light emitting layer including a plurality oflight emitting portions, the orthographic projection of the opening edgeof the mask plate on the base substrate is spaced from the orthographicprojection of the top end of the spacer on the base substrate, therebyavoiding the contact between the opening edge of the mask plate and thetop end of the spacer and avoiding the generation of foreign matterssuch as particles. Therefore, the manufacturing method of the displaysubstrate can improve the stability and reliability of the displaysubstrate and the yield of products.

In some examples, the above mask plate is a fine metal mask plate (FMM).

In some examples, the shape of the orthographic projection of the spaceron the base substrate is rectangular, and the orthographic projection ofthe central axis of the spacer in the length direction on the basesubstrate is spaced from the edge of the orthographic projection of thelight emitting portion on the base substrate. Therefore, themanufacturing method of the display substrate can avoid the contactbetween the opening edge of the fine metal mask plate and the top end ofthe spacer and avoid the generation of foreign matters such asparticles, thereby improving the stability and reliability of thedisplay substrate and the yield of products.

In some examples, the orthographic projection of the spacer on the basesubstrate is spaced from the edge of the orthographic projection of thelight emitting portion on the base substrate. Therefore, the displaysubstrate can further avoid the contact between the opening edge of thefine metal mask plate and the top end of the spacer, and avoid thegeneration of foreign matters such as particles, thereby furtherimproving the stability and reliability of the display substrate and theyield of products.

FIG. 25 to FIG. 27 are schematic planar diagrams of a mask groupaccording to an embodiment of the present disclosure. As shown in FIG.25 to FIG. 27 , the mask group includes a first mask 510, a second mask520, and a third mask 530. The first mask 510 includes a plurality offirst mask openings 412. Each of the first mask openings 412 is used forforming the foregoing first organic material portion 1851. The secondmask 520 includes a plurality of second mask openings 422. Each of thesecond mask openings 422 is used for forming the second organic materialportion 1852 and the third organic material portion 1853. That is, thesecond organic material portion 1852 and the third organic materialportion 1853 may be formed by using the same mask opening. The thirdmask 530 includes a plurality of third mask openings 432. Each of thethird mask openings 432 is used for forming the foregoing fourth organicmaterial portion 1854.

For example, as shown in FIG. 25 to FIG. 27 , in the method formanufacturing the display substrate, the foregoing step S103 mayinclude: as shown in FIG. 25 , placing the first mask 510 on the side ofthe spacer 220 away from the base substrate 110, and evaporating thelight emitting material in the plurality of openings 1951 by using thefirst mask 510 as a mask, to form the plurality of first organicmaterial portions 1851; removing the first mask 510; as shown in FIG. 26, placing the second mask 520 on the side of the spacer 220 away fromthe base substrate 110, and evaporating the light emitting material inthe plurality of openings 1951 and 1952 by using the second mask 520 asa mask, to form the plurality of second organic material portions 1852and the plurality of third organic material portions 1853; removing thesecond mask 520; and as shown in FIG. 27 , placing the third mask 530 onthe side of the spacer 220 away from the base substrate 110, andevaporating the light emitting material in the plurality of openings1954 by using the third mask 530 as a mask, to form the plurality offourth organic material portions 1854.

For example, as shown in FIG. 25 to FIG. 27 , the orthographicprojection of the top end of the spacer 220 away from the base substrate110 on the base substrate 110 is spaced from an edge of the orthographicprojection of the first organic material portion 1851 or the fourthorganic material portion 1854 on the base substrate 110.

On the other hand, with the continuous development of the OLED displaytechnology, people pose increasingly high requirements for the displayeffect. In researches, the inventor of this application notices that,there are many factors that affect the display effect of the OLEDdisplay device. The size of the load of the gate electrode layer affectsthe charging time of a pixel driving circuit, and the charging time ofthe pixel driving circuit includes relatively large impact on thedisplay effect. Usually, the load of the gate electrode layer is mainlyformed by a gate electrode line and a reset signal line. On the otherhand, the size of the load of the data line (or a source line) directlyrelates to the power consumption of an IC. Larger load of the data lineindicates a higher requirement for an IC driver, which leads to higherpower consumption of the IC. Therefore, when the load between the gateelectrode line and the reset signal line and the load on the data lineare controlled, the display effect of the OLED display device can beimproved, and the power consumption of the OLED display device can bereduced.

Regarding this, the embodiments of the present disclosure provide adisplay substrate and a display device. The display substrate includes abase substrate, a first gate electrode layer, a second gate electrodelayer, and a first conductive layer. The first gate electrode layer islocated on the base substrate. The second gate electrode layer islocated on a side of the first gate electrode layer away from the basesubstrate. The first conductive layer is located on a side of the secondgate electrode layer away from the base substrate. The first gateelectrode layer includes a reset signal line and a first electrode blockthat extend along the first direction. The second gate electrode layerincludes a second electrode block. The second electrode block isconfigured to form a storage capacitor with the first electrode block.The first conductive layer includes a power line that extends along thesecond direction. There is a first overlapping region between the resetsignal line and the power line. There is a second overlapping regionbetween the second electrode block and the power line. The width of thepower line located in the first overlapping region is less than thewidth of the power line located in the second overlapping region. Thefirst direction intersects with the second direction. Therefore, byreducing the width of the power line in the first overlapping region inwhich the reset signal line is overlapped with the power line, thedisplay substrate can reduce the load of the reset signal line, toimprove the charging time of the pixel driving circuit, therebyimproving the display effect of the display substrate.

The display substrate and the display device that are provided in theembodiments of the present disclosure are described in detail below withreference to the accompanying drawings.

An embodiment of the present disclosure provides a display substrate.FIG. 28A is a partial schematic diagram of another display substrateaccording to an embodiment of the present disclosure. FIG. 28B is apartial schematic diagram of another display substrate according to anembodiment of the present disclosure. FIG. 29 is a schematiccross-sectional view of a display substrate according to an embodimentof the present disclosure along an FF direction in FIG. 28A. To clearlyshow a layered structure of the films in a pixel driving circuitstructure in the display substrate, an anode layer and a secondconductive layer are omitted in FIG. 28B.

As shown in FIG. 28A, FIG. 28B, and FIG. 29 , the display substrate 100includes a base substrate 110, a first gate electrode layer 130, asecond gate electrode layer 140, and a first conductive layer 150. Thefirst gate electrode layer 130 is located on the base substrate 110. Thesecond gate electrode layer 140 is located on a side of the first gateelectrode layer 130 away from the base substrate 110. The firstconductive layer 150 is located on a side of the second gate electrodelayer 140 away from the base substrate 110. The first gate electrodelayer 130 includes a reset signal line 131 and a first electrode blockCE1 that extend along the first direction. The second gate electrodelayer 140 includes a second electrode block CE2. The second electrodeblock CE2 is configured to form a storage capacitor with the firstelectrode block CE1. The first conductive layer 150 includes a powerline 151 that extends along the second direction. There is a firstoverlapping region 351 between the reset signal line 131 and the powerline 151. There is a second overlapping area 352 between the secondelectrode block CE2 and the power line 151. The width of the power line151 located in the first overlapping region 351 is less than the widthof the power line 151 located in the second overlapping region 352. Thatis, the width of the power line 151 in the first overlapping region 351is shortened, and the first direction intersects with, for example, isperpendicular to the second direction. It should be noted that, thewidth of the foregoing power line is the size of the power line alongthe first direction. Correspondingly, the length of the power line isthe size of the power line along the second direction.

In the display substrate provided in this embodiment of the presentdisclosure, when the width of the power line in the first overlappingregion in which the reset signal line is overlapped with the power line,the area in which the reset signal line is overlapped with the powerline can be reduced, thereby reducing the parasitic capacitance betweenthe reset signal line and the power line. Therefore, by reducing thewidth of the power line in the first overlapping region in which thereset signal line is overlapped with the power line, the displaysubstrate can reduce the load of the reset signal line, to improve thecharging time of the pixel driving circuit, thereby improving thedisplay effect of the display substrate.

In some examples, the first conductive layer may be a first source-drainmetal layer. The display substrate may further include a secondconductive layer, that is, a second source-drain metal layer. It shouldbe noted that, to clearly show the film structure on the displaysubstrate, a second conductive layer (second source-drain metal layer)is not shown on the display substrate shown in FIG. 28A. Certainly, thisembodiment of the present disclosure includes but is not limitedthereto. The display substrate may alternatively not include the secondconductive layer, and is a display substrate of a single source-drainmetal layer.

In some examples, the width of the power line 151 located in the firstoverlapping region 351 is less than an average width of the power line151.

In some examples, as shown in FIG. 28A and FIG. 28B, the width of thepower line 151 located in the first overlapping region 351 is less than5/7 of the largest width of the power line 151. Therefore, in thedisplay substrate, the load of the reset signal line can be effectivelyreduced.

In some examples, as shown in FIG. 28B, the power line 151 includes abody extension portion 151A and a narrowing portion 151B. The width ofthe narrowing portion 151B is less than the width of the body extensionportion 151A. The orthographic projection of the narrowing portion 151Bon the base substrate 110 is overlapped with the orthographic projectionof the reset signal line 131 on the base substrate 110.

In some examples, as shown in FIG. 28A and FIG. 28B, the first gateelectrode layer 130 further includes a gate electrode line 132 extendingalong the first direction. There is a third overlapping region 353between the gate electrode line 132 and the power line 151. The width ofthe power line 151 in the third overlapping region 353 is less than thewidth of the power line 151 located in the second overlapping region352. That is, the width of the power line in the third overlappingregion is also shortened. Therefore, by reducing the width of the powerline in the second overlapping region in which the gate electrode lineis overlapped with the power line, the display substrate can reduce theload of the gate electrode line, to further improve the charging time ofthe pixel driving circuit, thereby improving the display effect of thedisplay substrate.

In some examples, the width of the power line 151 located in the thirdoverlapping region 353 is less than an average width of the power line151.

In some examples, as shown in FIG. 28A and FIG. 28B, the width of thepower line 151 located in the third overlapping region 353 is less than5/7 of the largest width of the power line 151. Therefore, in thedisplay substrate, the load of the reset signal line can be effectivelyreduced.

In some examples, as shown in FIG. 28B, the power line 151 includes abody extension portion 151A and a narrowing portion 151B. The width ofthe narrowing portion 151B is less than the width of the body extensionportion 151A. The orthographic projection of the narrowing portion 151Bon the base substrate 110 is overlapped with the orthographic projectionof the gate electrode line 132 on the base substrate 110.

In some examples, as shown in FIG. 28A and FIG. 28B, the firstconductive layer 150 further includes a data line 152 extending alongthe second direction. There is a fourth overlapping region 354 betweenthe data line 152 and the reset signal line 131. The width of the resetsignal line 131 in the fourth overlapping region 354 is less than theaverage width of the reset signal line 131. In this display substrate,when the width of the reset signal line in the fourth overlapping regionis reduced, the area in which the reset signal line is overlapped withthe data line can be reduced, thereby reducing the parasitic capacitancebetween the reset signal line and the data line. Therefore, by reducingthe width of the reset signal line in the fourth overlapping region, thedisplay substrate can reduce the load of the data line, to reduce thepower consumption of a driver, thereby reducing the power consumption ofthe display substrate. It should be noted that, the width of theforegoing reset signal line is the size of the reset signal line alongthe second direction. Correspondingly, the length of the reset signalline is the size of the reset signal line along the first direction.

In some examples, as shown in FIG. 28A and FIG. 28B, the width of thereset signal line 131 located in the fourth overlapping region 354 isless than ¾ of the largest width of the reset signal line 131.Therefore, in the display substrate, the load of the data line can beeffectively reduced.

In some examples, as shown in FIG. 28A and FIG. 28B, the displaysubstrate 100 further includes a semiconductor layer 120 located on aside of the first gate electrode layer 130 close to the base substrate110. The second gate electrode layer 140 includes an initializationsignal line 141 extending along the first direction. There is a fifthoverlapping region 355 between the data line 152 and the initializationsignal line 141. There is a sixth overlapping region 356 between theinitialization signal line 141 and the semiconductor layer 120. Thewidth of the initialization signal line 141 located in the fifthoverlapping region 355 is less than the width of the initializationsignal line 141 located in the sixth overlapping region 356. In thisdisplay substrate, when the width of the initialization signal line inthe fifth overlapping region is reduced, the area in which theinitialization signal line is overlapped with the data line can bereduced, thereby reducing the parasitic capacitance between theinitialization signal line and the data line. Therefore, by reducing thewidth of the initialization signal line in the fifth overlapping region,the display substrate can further reduce the load of the data line, toreduce the power consumption of a driver, thereby reducing the powerconsumption of the display substrate. It should be noted that, the widthof the foregoing initialization signal line is the size of theinitialization signal line along the second direction. Correspondingly,the length of the initialization signal line is the size of theinitialization signal line along the first direction.

In some examples, the width of the initialization signal line 141located in the fourth overlapping region 354 is less than an averagewidth of the initialization signal line 141.

For example, as shown in FIG. 28B, the orthographic projection of thenarrowing portion 151B overlapping the reset signal line 131 on the basesubstrate 110 is further overlapped with the orthographic projection ofthe initialization signal line 141 on the base substrate 110.

In some examples, as shown in FIG. 28B, the power line 151 includes abody extension portion 151A and a narrowing portion 151B. The width ofthe narrowing portion 151B is less than the width of the body extensionportion 151A. The orthographic projection of the narrowing portion 151Bon the base substrate 110 does not overlap the orthographic projectionof the semiconductor layer 110 on the base substrate 110.

In some examples, as shown in FIG. 28B, the second gate electrode layer140 further includes a conductive block 143. The body extension portion151A includes a connection portion 151C connected to the conductiveblock 143. The orthographic projection of the connection portion 151C onthe base substrate 110 is partially overlapped with the orthographicprojection of the semiconductor layer 110 on the base substrate 110. Theconnection portion 151C is adjacent to the narrowing portion 151B in thesecond direction.

For example, as shown in FIG. 28B, the connection portion 151C may belocated between two narrowing portions 151B.

In some examples, as shown in FIG. 28A and FIG. 28B, the width of theinitialization signal line 141 located in the fourth overlapping region354 is less than ¾ of the largest width of the initialization signalline 151. Therefore, in the display substrate, the load of the data linecan be effectively reduced.

For example, the semiconductor layer 120 may use a silicon-basedsemiconductor material, such as polysilicon. Certainly, this embodimentof the present disclosure includes but is not limited thereto. Thesemiconductor layer may alternatively use a semiconductor material.

FIG. 30A to FIG. 30D are schematic planar diagrams of a plurality offilms in a display substrate according to an embodiment of the presentdisclosure. FIG. 31 is an equivalent schematic diagram of a pixeldriving circuit in a display substrate according to an embodiment of thepresent disclosure.

For example, as shown in FIG. 30A, a semiconductor layer 120 includes afirst unit 121, a second unit 122, a third unit 123, a fourth unit 124,a fifth unit 125, a sixth unit 126, and a seventh unit 127. The firstunit 121 includes a first channel region C1 and a first source region S1and a first drain region D1 located on both sides of the first channelregion C1. The second unit 122 includes a second channel region C2 and asecond source region S2 and a second drain region D2 located on bothsides of the second channel region C2. The third unit 123 includes athird channel region C3 and a third source region S3 and a third drainregion D3 located on both sides of the third channel region C3. Thefourth unit 124 includes a fourth channel region C4 and a fourth sourceregion S4 and a fourth drain region D4 located on both sides of thefourth channel region C4. The fifth unit 125 includes a fifth channelregion C5 and a fifth source region S5 and a fifth drain region S5located on both sides of the fifth channel region C5. The sixth unit 126includes a sixth channel region C6 and a sixth source region S6 and asixth drain region D6 located on both sides of the sixth channel regionC6. The seventh unit 127 includes a seventh channel region C7 and aseventh source region S7 and a seventh drain region D7 located on bothsides of the seventh channel region C7.

For example, as shown in FIG. 30A and FIG. 31 , the sixth drain regionD6 is connected to the third drain region D3, the third source regionS3, the first drain region D1, and the fifth source region S5 areconnected to a first node N1, the first source region S1, the seconddrain region D2, and the fourth drain region D4 are connected to asecond node N2, and the fifth drain region D5 is connected to theseventh drain region D7.

For example, as shown in FIG. 30B, a first gate electrode layer 130includes a reset signal line 131 extending along the first direction, agate electrode line 132 and a first electrode block CE1 that extendalong the first direction, and an emission control line 133 that extendsalong the first direction.

For example, as shown in FIG. 30C, a second gate electrode layer 140includes an initialization signal line 141, a second electrode block CE2and a conductive block 143 that extend along the first direction. Forexample, the conductive block 143 may be connected to a power line, toreduce resistance of the power line.

As shown in FIG. 31 , the sixth source region S6 and the seventh sourceregion S7 are connected to the initialization signal line 141. The firstelectrode block CE1 and the second electrode block CE2 may form astorage capacitor Cst.

For example, as shown in FIG. 30D, the first conductive layer 150includes a power line 151, a data line 152, a first connection block1541, a second connection block 1542, and a third connection block 1543that extend along the second direction. The first connection block 1541is configured to connect the initialization signal line 141 to the sixthsource region S6 and the seventh source region S7. The second connectionblock 1542 is configured to connect the third drain region D3 to thefirst electrode block CE1. The third connection block 1543 is connectedto the fifth drain region D5, and may be connected to a correspondinganode as a drain.

For example, as shown in FIG. 31 , the second source region S2 isconnected to a data line 152, and the fourth source region S4 isconnected to the power line 151. Therefore, the first unit 121, thesecond unit 122, the third unit 123, the fourth unit 124, the fifth unit125, the sixth unit 126, and the seventh unit 127 of the semiconductorlayer 120 may form a first thin film transistor T1, a second thin filmtransistor T2, a third thin film transistor T3, a fourth thin filmtransistor T4, a fifth thin film transistor T5, a sixth thin filmtransistor T6, and a seventh thin film transistor T7 with the foregoingreset signal line 131 and gate electrode line 132.

The following schematically describes a working manner of the pixeldriving circuit shown in FIG. 31 . First, when a reset signal istransmitted to the reset signal line 131 to conduct the seventh thinfilm transistor T7, remaining current that flows through the anode ofeach sub-pixel is discharged to the sixth thin film transistor T6through the seventh thin film transistor T7, to inhibit light emissioncaused by the remaining current that flows through the anode of eachsub-pixel. Then, when a reset signal is transmitted to the reset signalline 131 and an initialization signal is transmitted to theinitialization signal line 141, the sixth thin film transistor T6 isconducted, and an initialization voltage Vint is applied to a first gateelectrode of the first thin film transistor T1 and the first electrodeblock CE1 of the storage capacitor Cst through the sixth thin filmtransistor T6, so that the first gate electrode and the storagecapacitor Cst are initialized. The initialization of the first gateelectrode can conduct the first thin film transistor T1.

Subsequently, when a gate electrode signal is transmitted to the gateelectrode line 132 and a data signal is transmitted to the data line152, both the second thin film transistor T2 and the third thin filmtransistor T3 are conducted, and a data voltage Vd is applied to thefirst gate electrode through the second thin film transistor T2 and thethird thin film transistor T3. In this case, the voltage applied to thefirst gate electrode is a compensating voltage Vd+Vth, and thecompensating voltage applied to the first gate electrode is also appliedto the first electrode block CE1 of the storage capacitor Cst.

Subsequently, the power line 151 applies a drive voltage Vel to thesecond electrode block CE2 of the storage capacitor Cst, and applies thecompensating voltage Vd+Vth to the first electrode block CE1, so thatcharges corresponding to a difference between voltages that arerespectively applied to two electrodes of the storage capacitor Cst arestored in the storage capacitor Cst, and conduction of the first thinfilm transistor T1 reaches preset time.

Subsequently, when an emission control signal is applied to the emissioncontrol line 133, both the fourth thin film transistor T4 and the fifththin film transistor T5 are conducted, so that the fourth thin filmtransistor T4 applies the drive voltage Vel to the fifth thin filmtransistor T5. When the drive voltage Vel runs through the first thinfilm transistor T1 conducted by the storage capacitor Cst, a differencebetween the corresponding drive voltage Vel and the voltage that isapplied to the first gate electrode through the storage capacitor Cstdrives current Id to flow through a first drain region D3 of the firstthin film transistor T1, and drives the current Id to be applied to eachsub-pixel through the fifth thin film transistor T5, so that the lightemitting layer of each sub-pixel emits light.

In some examples, as shown in FIG. 29 and FIG. 31 , the displaysubstrate 100 further includes a first planarization layer 241, a secondconductive layer 160, a second planarization layer 242, and an anode175. The first planarization layer 241 is located on a side of the firstconductive layer 150 away from the base substrate 110. The secondconductive layer 160 is located on a side of the first planarizationlayer 241 away from the first conductive layer 150, and includes aconnection electrode 161. The second planarization layer 242 is locatedon a side of the second conductive layer 160 away from the firstplanarization layer 241. The anode 175 is located on a side of thesecond planarization layer 242 away from the second conductive layer160. The first planarization layer 241 includes a first via hole H1. Theconnection electrode 161 is connected to the fifth drain region S5through the first via hole H1. The second planarization layer 242includes a second via hole H2. The anode 175 is connected to theconnection electrode 161 through the second via hole H2.

An embodiment of the present disclosure provides a display device. FIG.32 is a schematic diagram of a display device according to an embodimentof the present disclosure. As shown in FIG. 32 , the display device 400includes any foregoing display substrate 100. Therefore, the displaydevice includes beneficial effects corresponding to the beneficialeffects of the display substrate. For example, the display device canreduce the load of the gate electrode layer, to improve the chargingtime of the pixel driving circuit, thereby improving the display effectof the display substrate.

For example, the display device may be an electronic product thatincludes a display function, such as a TV, a computer, a notebookcomputer, a tablet computer, a mobile phone, a navigator, or anelectronic photo frame.

On the other hand, the long-term light emission stability of an OLEDdisplay device is also an important specification or index of the OLEDdisplay device. In researches, the inventor of this application noticesthat, there are many factors that affect the long-term light emissionstability of the OLED display device. In addition to the life service ofthe light emitting material, the working status of the thin filmtransistor in the pixel driving circuit includes impact on the lightemission brightness and the long-term light emission stability to someextent.

Regarding this, the embodiments of the present disclosure provide adisplay substrate and a display device. The display substrate includes abase substrate, a pixel circuit layer, and an anode layer. The pixelcircuit layer is located on the base substrate and includes a pluralityof pixel driving circuits. The anode layer is located on a side of thepixel circuit layer away from the base substrate and includes aplurality of anodes. The plurality of pixel driving circuits and theplurality of anodes are disposed in a one-to-one correspondence manner.Each pixel driving circuit includes a functional thin film transistor.The plurality of pixel driving circuits include a first pixel drivingcircuit and a second pixel driving circuit that are adjacent to eachother. Orthographic projections of a channel region of the functionalthin film transistor in the first pixel driving circuit and a channelregion of the functional thin film transistor in the second pixeldriving circuit on the base substrate both overlap the orthographicprojection of the anode corresponding to the first pixel driving circuiton the base substrate. Therefore, in the display substrate, the channelregion of the functional thin film transistor in the first pixel drivingcircuit and the channel region of the functional thin film transistor inthe second pixel driving circuit are shielded simultaneously through theanode, to improve the stability and the service life of the functionalthin film transistor, thereby improving the long-term light emissionstability and the service life of the display substrate.

Hereinafter, the display substrate and the display device that areprovided in the embodiments of the present disclosure are described indetail with reference to the accompanying drawings.

An embodiment of the present disclosure provides a display substrate.FIG. 33 is a partial schematic diagram of a display substrate accordingto an embodiment of the present disclosure. FIG. 34 is a schematiccross-sectional view of a display substrate according to an embodimentof the present disclosure along a KK direction in FIG. 33 . FIG. 35A isa schematic cross-sectional view of a display substrate according to anembodiment of the present disclosure along an MM direction in FIG. 33 .FIG. 35B is a schematic cross-sectional view of a display substrateaccording to an embodiment of the present disclosure along an NNdirection in FIG. 33 . FIG. 35C is a schematic cross-sectional view of adisplay substrate according to an embodiment of the present disclosurealong a QQ direction in FIG. 33 .

As shown in FIG. 33 and FIG. 34 , the display substrate 100 includes abase substrate 110, a pixel circuit layer 260, and an anode layer 170.The pixel circuit layer 260 is located on the base substrate 110 andincludes a plurality of pixel driving circuits 265. The anode layer 170is located on a side of the pixel circuit layer 260 away from the basesubstrate 110 and includes a plurality of anodes 175. The plurality ofpixel driving circuits 265 and the plurality of anodes 175 are disposedin a one-to-one correspondence manner. Each pixel driving circuit 265includes a functional thin film transistor, such as a compensating thinfilm transistor T3. The plurality of pixel driving circuits 265 includea first pixel driving circuit 2657 and a second pixel driving circuit2658 that are adjacent to each other. Orthographic projections of achannel region of the compensating thin film transistor T3 in the firstpixel driving circuit 2657 and a channel region of the compensating thinfilm transistor T3 in the second pixel driving circuit 2658 on the basesubstrate 110 both overlap the orthographic projection of the anode 175corresponding to the first pixel driving circuit 2657 on the basesubstrate 110. It should be noted that, “first” and “second” in theforegoing first pixel driving circuit and second pixel driving circuitare only used for literally distinguishing the two pixel drivingcircuits. The specific structures of the two pixel driving circuits arethe same. In addition, the foregoing functional thin film transistor mayalternatively be another thin film transistor in the pixel drivingcircuit.

In the display substrate provided in this embodiment of the presentdisclosure, because the orthographic projections of the channel regionof the compensating thin film transistor T3 in the first pixel drivingcircuit 2657 and the channel region of the compensating thin filmtransistor T3 in the second pixel driving circuit 2658 on the basesubstrate 110 both overlap the orthographic projection of the anode 175corresponding to the first pixel driving circuit 2657 on the basesubstrate 110, the anode 175 corresponding to the first pixel drivingcircuit 2657 can partially shield or completely shield the channelregion of the compensating thin film transistor T3 in the first pixeldriving circuit 2657 and the channel region of the compensating thinfilm transistor T3 in the second pixel driving circuit 2658. Therefore,in the display substrate, the stability and the service life of thecompensating thin film transistor T3 in the first pixel driving circuitand the compensating thin film transistor T3 in the second pixel drivingcircuit 2658 can be improved, thereby improving the long-term lightemission stability and the service life of the display substrate. FIG.30A to FIG. 30D are schematic planar diagrams of a plurality of films ina display substrate according to an embodiment of the presentdisclosure. FIG. 31 is an equivalent schematic diagram of a pixeldriving circuit in a display substrate according to an embodiment of thepresent disclosure. The pixel driving circuit uses a 7T1C pixel drivingstructure. At a light emitting stage, a voltage of a node N3 may controlan on/off state of the first thin film transistor T1 (that is, the drivethin film transistor), and the stability of the first thin filmtransistor T1 directly affects the long-term light emission stability ofthe OLED display device. At a charging stage, a charging voltage of thenode N3 is related to the states of the third thin film transistor T3(that is, the compensating thin film transistor), the first thin filmtransistor T1, and the second thin film transistor T2. Usually, the thinfilm transistor is particularly sensitive to illumination. Whenilluminated, the thin film transistor (particularly the channel region)easily causes the characteristic of the thin film transistor to drift,affecting normal work of the pixel driving circuit. In this embodimentof the present disclosure, the channel region of the compensating thinfilm transistor is shield through an anode, so that the stability andthe service life of the compensating thin film transistor can beimproved, thereby improving the long-term light emission stability andthe service life of the display substrate.

In some examples, as shown in FIG. 33 to FIG. 35C, the channel region ofthe compensating thin film transistor T3 in the first pixel drivingcircuit 2657 and the channel region of the compensating thin filmtransistor T3 in the second pixel driving circuit 2658 both fall intothe orthographic projection of the anode 175 (corresponding to thefourth anode 1754) corresponding to the first pixel driving circuit 2657on the base substrate 110, and the anode 175 corresponding to the firstpixel driving circuit 2657 can completely shield the channel region ofthe compensating thin film transistor T3 in the first pixel drivingcircuit 2657 and the channel region of the compensating thin filmtransistor T3 in the second pixel driving circuit 2658, to furtherimprove the stability and the service life of the compensating thin filmtransistor, thereby improving the long-term light emission stability andservice life of the display substrate.

In some examples, as shown in FIG. 30A, the compensating thin filmtransistor T3 may be a thin film transistor with a dual-gate electrodestructure, to improve the reliability of the compensating thin filmtransistor. The channel region of the compensating thin film transistorT3 includes a first channel region C1 and a second channel region C2that are spaced from each other. The compensating thin film transistorT3 further includes a common electrode SE located between the firstchannel region C1 and the second channel region C2. As shown in FIG. 33to FIG. 35B, orthographic projections of the common electrode SE of thecompensating thin film transistor T3 in the first pixel driving circuit2657 and the common electrode SE of the compensating thin filmtransistor T3 in the second pixel driving circuit 2658 on the basesubstrate 110 both overlap the orthographic projection of the anode 175corresponding to the first pixel driving circuit 2657 on the basesubstrate 110. Therefore, the anode 175 corresponding to the first pixeldriving circuit 2657 can partially shield or completely shield thecommon electrode SE of the compensating thin film transistor T3 in thefirst pixel driving circuit 2657 and the common electrode SE of thecompensating thin film transistor T3 in the second pixel driving circuit2658, to improve the stability and the service life of the compensatingthin film transistor, thereby improving the long-term light emissionstability and the service life of the display substrate.

FIG. 36 is a schematic planar diagram of another display substrateaccording to an embodiment of the present disclosure. As shown in FIG.36 , the plurality of anodes 175 include a plurality of anode groups1750. Each of the anode groups 1750 includes a first anode 1751, asecond anode 1752, a third anode 1753, and a fourth anode 1754. Itshould be noted that, the foregoing first anode, second anode, thirdanode, and fourth anode may be anodes of sub-pixels of different shapesand different colors. Certainly, this embodiment of the presentdisclosure includes but is not limited thereto. At least two of theforegoing first anode, second anode, third anode, and fourth anode maybe anodes of sub-pixels of the same shape and the same color.

In some examples, as shown in FIG. 36 , the plurality of anodes 175include a plurality of anode groups 1750. The plurality of anode groups1750 are arranged along the first direction to form a plurality of anodegroup columns 380, and are arranged along the second direction to form aplurality of anode group rows 390. Each of the anode groups 1750includes a first anode 1751, a second anode 1752, a third anode 1753,and a fourth anode 1754. Two adjacent anode group rows 390 are offsetfrom each other by ½ pitch. The pitch is equal to a distance betweencenters of two first anodes 1751 in two anode groups 1750 that areadjacent in the first direction. The second anode 1752 and the thirdanode 1753 are arranged along the second direction to form an anode pair1755. The first anode 1751, the anode pair 1755, and the fourth anode1754 are arranged along the second direction. Therefore, the displaysubstrate can provide a pixel arrangement structure, so that the displayeffect of a display device using the display substrate can be improved.It should be noted that, the anode group provided in this embodiment ofthe present disclosure includes but not limited to the foregoing pixelarrangement structure. In addition, the center of the first anode is acenter of a body portion of the first anode, that is, the effectivelight emitting region of the first light emitting element correspondingto the first anode. For example, the first direction is approximatelyperpendicular to the second direction. It should be noted that, that thefirst direction is approximately perpendicular to the second directionincludes a case that an angle between the first direction and the seconddirection is 90 degrees, and also includes a case that the angle betweenthe first direction and the second direction ranges from 85 degrees to95 degrees.

In some examples, as shown in FIG. 33 , the first pixel driving circuit2657 and the second pixel driving circuit 2658 are disposed along thefirst direction. The fourth anode 1754 in an anode group 1750 isdisposed corresponding to and electrically connected to the first pixeldriving circuit 2657, and the second anode 1752 in another anode group1750 is disposed corresponding to and electrically connected to thesecond pixel driving circuit 2658.

In some examples, as shown in FIG. 33 , FIG. 34 , and FIG. 36 , thedisplay substrate 100 further includes a pixel defining layer 190. Thepixel defining layer 190 is located on a side of the anode layer 170away from the base substrate 110 and includes a plurality of openings195. The plurality of openings 195 include a plurality of opening groups1950. Each opening group 1950 includes a first opening 1951, a secondopening 1952, a third opening 1953, and a fourth opening 1954. The firstopening 1951 is disposed corresponding to the first anode 1751 andexposes the first anode 1751. The second opening 1952 is disposedcorresponding to the second anode 1752 and exposes the second anode1752. The third opening 1953 is disposed corresponding to the thirdanode 1753 and exposes the third anode 1753. The fourth opening 1954 isdisposed corresponding to the fourth anode 1754 and exposes the fourthanode 1754.

As shown in FIG. 33 and FIG. 36 , the first anode 1751 includes a firstbody portion 1751A and a first connection portion 1751B. Theorthographic projection of the first opening 1951 on the base substrate110 falls into the orthographic projection of the first body portion1751A on the base substrate 110. The first connection portion 1751B isconnected to a pixel driving circuit 265 corresponding to the firstanode 1751. The second anode 1752 includes a second body portion 1752Aand a second connection portion 1752B. The orthographic projection ofthe second opening 1952 on the base substrate 110 falls into theorthographic projection of the second body portion 1752A on the basesubstrate 110, and the second connection portion 1752B is connected tothe pixel driving circuit 265 corresponding to the second anode 1752.The third anode 1753 includes a third body portion 1753A and a thirdconnection portion 1753B. The orthographic projection of the thirdopening 1953 on the base substrate 110 falls into an orthographicprojection of the third body portion 1753A on the base substrate 110,and the third connection portion 1753B is connected to the pixel drivingcircuit 265 corresponding to the third anode 1753. The fourth anode 1754includes a fourth body portion 1754A and a fourth connection portion1754B. The orthographic projection of the fourth opening 1954 on thebase substrate 110 falls into an orthographic projection of the fourthbody portion 1754A on the base substrate 110, and the fourth connectionportion 1754B is connected to the pixel driving circuit 265 (forexample, the foregoing first pixel driving circuit 2657) correspondingto the fourth anode 1754.

In some examples, as shown in FIG. 33 and FIG. 36 , the shape of thefirst body portion 1751A is approximately the same as that of the firstopening 1951; the shape of the second body portion 1752A isapproximately the same as that of the second opening 1952; the shape ofthe third body portion 1753A is approximately the same as that of thethird opening 1953; and the shape of the fourth body portion 1754A isapproximately the same as that of the fourth opening 1954. For example,when the shape of the fourth opening 1954 is a hexagon, the shape of thefourth body portion 1754A is also a hexagon. Certainly, the shapes ofthe fourth opening and the fourth body portion are not limited to thehexagon, and may be, for example, other shapes such as an ellipse.

For example, as shown in FIG. 33 to FIG. 36 , the fourth anode 1754further includes a first supplementing portion 1754C. The orthographicprojections of the first channel region C31 and the second channelregion C32 of the compensating thin film transistor T3 in the firstpixel driving circuit 2657 corresponding to the fourth anode 1754 on thebase substrate 110 separately overlap the orthographic projection of thefirst supplementing portion 1754C on the base substrate 110. In thisdisplay substrate, the first supplementing portion is added to thefourth anode, so that the fourth anode can cover two channel regions ofthe compensating thin film transistor in a corresponding one of thepixel driving circuits, to improve the stability and the service life ofthe compensating thin film transistor, thereby improving the long-termlight emission stability and the service life of the display substrate.

In some examples, as shown in FIG. 33 to FIG. 36 , the firstsupplementing portion 1754C is protruded from the fourth body portion1754A toward the third anode 1753, and the first supplementing portion1754C is located on a side of the fourth connection portion 1754B closeto the fourth body portion 1754A. In some examples, as shown in FIG. 33to FIG. 36 , the first supplementing portion 1754C is connected to boththe fourth body portion 1754A and the fourth connection portion 1754B.Therefore, the display substrate can fully use the area on the displaysubstrate, to densely arrange the first anode, the second anode, thethird anode, and the fourth anode, so that the resolution of the displaysubstrate can be ensured.

In some examples, as shown in FIG. 35A, the orthographic projection ofthe first supplementing portion 1754C on the base substrate 110 ispartially overlapped with the orthographic projection of the commonelectrode SE of the compensating thin film transistor T3 on the basesubstrate 110.

For example, as shown in FIG. 35A, the orthographic projection of thefirst supplementing portion 1754C on the base substrate 110 covers theorthographic projection of the second channel region C32 of thecompensating thin film transistor T3 on the base substrate 110.

For example, as shown in FIG. 35A, the orthographic projection of thefourth body portion 1754A on the base substrate 110 covers the drainregion D3 of the compensating thin film transistor T3. For example, asshown in FIG. 35C, the first conductive layer 150 includes a secondconnection block 1542. The second connection block 1542 is configured toconnect a drain region of a compensating thin film transistor to thefirst electrode block CE1. The first electrode block CE1 may form astorage capacitor with the second electrode block CE2, and is also usedas a gate electrode of a drive thin film transistor. Because theconnection portion 1752B of the second anode 1752 extends away from thethird anode 1753 and is overlapped with the second connection block1542, and even covers the foregoing second connection block 1542, theconnection portion 1752B can stabilize electric potentials on the gateelectrode of the drive thin film transistor and the drain electrode ofthe compensating thin film transistor, thereby improving the long-termlight emission stability and the service life of the display substrate.

FIG. 37A is a partial schematic diagram of another display substrateaccording to an embodiment of the present disclosure. FIG. 37B is apartial schematic diagram of another display substrate according to anembodiment of the present disclosure. To clearly show the shapes of theanodes, FIG. 37B shows only the anode layer.

As shown in FIG. 37A and FIG. 37B, the fourth anode 1754 furtherincludes a second supplementing portion 1754D. The orthographicprojection of the second channel region C2 of the compensating thin filmtransistor T3 in the second pixel driving circuit 2658 on the basesubstrate 110 is overlapped with the orthographic projection of thesecond supplementing portion 1754D on the base substrate 110. The secondsupplementing portion is added to the fourth anode, so that the fourthanode can partially or even completely cover the second channel regionC2 of the compensating thin film transistor T3 in the second pixeldriving circuit 2658, to improve the stability and the service life ofthe compensating thin film transistor, thereby improving the long-termlight emission stability and the service life of the display substrate.

In some examples, as shown in FIG. 37A and FIG. 37B, the secondsupplementing portion 1754D is protruded from the fourth body portion1754A toward the first anode 1751 in the anode group 1750 adjacent inthe first direction.

It should be noted that, as shown in FIG. 37A and FIG. 37B, theorthographic projection of the first channel region C1 of thecompensating thin film transistor T3 in the second pixel driving circuit2658 can fall into the orthographic projection of the fourth bodyportion 1754A on the base substrate 110.

In some examples, as shown in FIG. 37A and FIG. 37B, the orthographicprojection of the common electrode SE of the compensating thin filmtransistor T3 in the first pixel driving circuit 2657 on the basesubstrate 110 is overlapped with the orthographic projection of thefirst supplementing portion 1754C on the base substrate 110. Theorthographic projection of the common electrode SE of the compensatingthin film transistor T3 in the second pixel driving circuit 2658 on thebase substrate 110 is overlapped with the orthographic projection of thefourth body portion 1754A of the fourth anode 1754 corresponding to thefirst pixel driving circuit 2657 on the base substrate 110.

In some examples, as shown in FIG. 37A and FIG. 37B, the orthographicprojection of the channel region of the compensating thin filmtransistor T3 in the pixel driving circuit 265 corresponding to thefirst anode 1751 falls into the orthographic projection of the firstbody portion 1751A on the base substrate 110.

In some examples, as shown in FIG. 38 , the pixel driving circuit 265further includes a drive thin film transistor T1. A gate electrode G1 ofthe drive thin film transistor T1 is connected to a drain D3 of thecompensating thin film transistor T3. As shown in FIG. 37A, the firstanode 1751 further includes a third supplementing portion 1751C thatproduces from the first body portion 1751A toward the third anode 1753.The orthographic projections of the gate electrode G1 in the drive thinfilm transistor T1 and the drain D3 of the compensating thin filmtransistor T3 in the pixel driving circuit 265 corresponding to thefirst anode 1751 on the base substrate 110 fall into the orthographicprojection of the third supplementing portion 1751C on the basesubstrate 110. Therefore, in the display substrate, the electricpotentials on the gate electrode G1 of the drive thin film transistor T1and the drain D3 of the compensating thin film transistor T3 can bestabilized through the third supplementing portion 1751C, therebyimproving the long-term light emission stability and the service life ofthe display substrate.

In some examples, as shown in FIG. 37A and FIG. 37B, the orthographicprojection of the first channel region C31 of the compensating thin filmtransistor T3 in the pixel driving circuit 265 corresponding to thethird anode 1753 on the base substrate 110 falls into the orthographicprojection of the third body portion 1753A on the base substrate 110.

In some examples, as shown in FIG. 37A and FIG. 37B, the third anode1753 further includes a fourth supplementing portion 1753C. Theorthographic projection of the second channel region C32 of thecompensating thin film transistor T3 in the pixel driving circuit 265corresponding to the third anode 1753 on the base substrate 110 fallsinto the orthographic projection of the fourth supplementing portion1753C on the base substrate 110. Therefore, the body portion and thefourth supplementing portion of the third anode can partially orcompletely shield the first channel region C31 and the second channelregion C32 of the compensating thin film transistor T3 in the pixeldriving circuit 265 corresponding to the third anode 1753, to improvethe stability and the service life of the compensating thin filmtransistor, thereby improving the long-term light emission stability andthe service life of the display substrate.

In some examples, as shown in FIG. 33 and FIG. 34 , the pixel circuitlayer 260 further includes a semiconductor layer 120, a first gateelectrode layer 130, a second gate electrode layer 140, and a firstconductive layer 150. The first gate electrode layer 130 is located on aside of the semiconductor layer 120 away from the base substrate 110.The second gate electrode layer 140 is located on a side of the firstgate electrode layer 130 away from the base substrate 110. The firstconductive layer 150 is located on a side of the second gate electrodelayer 140 away from the base substrate 110.

For example, as shown in FIG. 30A, the semiconductor layer 120 includesa plurality of pixel driving units 1200, disposed corresponding to theplurality of anodes 175. Each pixel driving unit 1200 includes a firstunit 121, a second unit 122, a third unit 123, a fourth unit 124, afifth unit 125, a sixth unit 126, and a seventh unit 127. The first unit121 includes a first channel region C1 and a first source region S1 anda first drain region D1 located on both sides of the first channelregion C1. The second unit 122 includes a second channel region C2 and asecond source region S2 and a second drain region D2 located on bothsides of the second channel region C2. The third unit 123 includes athird channel region C3 and a third source region S3 and a third drainregion D3 located on both sides of the third channel region C3. Thefourth unit 124 includes a fourth channel region C4 and a fourth sourceregion S4 and a fourth drain region D4 located on both sides of thefourth channel region C4. The fifth unit 125 includes a fifth channelregion C5 and a fifth source region S5 and a fifth drain region S5located on both sides of the fifth channel region C5. The sixth unit 126includes a sixth channel region C6 and a sixth source region S6 and asixth drain region D6 located on both sides of the sixth channel regionC6. The seventh unit 127 includes a seventh channel region C7 and aseventh source region S7 and a seventh drain region D7 located on bothsides of the seventh channel region C7.

For example, as shown in FIG. 30A and FIG. 31 , the sixth drain regionD6 is connected to the third drain region D3, the third source regionS3, the first drain region D1, and the fifth source region S5 areconnected to a first node N1, the first source region S1, the seconddrain region D2, and the fourth drain region D4 are connected to asecond node N2, and the fifth drain region D5 is connected to theseventh drain region D7.

For example, as shown in FIG. 30B, the first gate electrode layer 130includes a reset signal line 131 extending along the first direction, agate electrode line 132 and a first electrode block CE1 that extendalong the first direction, and an emission control line 133 that extendsalong the first direction. The reset signal line 131 may overlap theseventh channel region C7 and the sixth channel region C6, to form theseventh thin film transistor T7 and the sixth thin film transistor T6with the seventh unit 127 and the sixth unit 126. The gate electrodeline 132 is separately overlapped with the third channel region C3 andthe second channel region C2, to form the third thin film transistor T3and the second thin film transistor T2 with the third unit 123 and thesecond unit 122. The first electrode block CE1 is overlapped with thefirst channel region C1, to form the third thin film transistor T1 withthe first unit 121. The emission control line 133 is overlapped with thefourth channel region C4 and the fifth channel region C5, to form thefourth thin film transistor T4 and the fifth thin film transistor T5with the fourth unit 124 and the fifth unit 125. It can be learned that,the foregoing thin film transistor T3 is a compensating thin filmtransistor.

For example, as shown in FIG. 30B, the reset signal line 131, the gateelectrode line 132, and the emission control line 133 all extend alongthe first direction, and the reset signal line 131, the gate electrodeline 132, the first electrode block CE1, and the emission control line133 are arranged along the second direction.

For example, as shown in FIG. 30C, the second gate electrode layer 140includes an initialization signal line 141, a second electrode block CE2and a conductive block 143 that extend along the first direction. Forexample, the conductive block 143 may be connected to a power line, toreduce resistance of the power line. In addition, the initializationsignal line 141 is connected to the seventh source region S7 and thefirst source region S1. The orthographic projection of the secondelectrode block CE2 on the base substrate 110 is at least partiallyoverlapped with the orthographic projection of the first electrode blockCE1 on the base substrate 110, to form a storage capacitor Cst. Itshould be noted that, the conductive block can also implement a lightshielding function. In addition, the conductive block on the leftmostside of FIG. 33 shows only a part, and the shape of the conductive blockon the leftmost side of FIG. 33 is the same as the shapes of otherconductive blocks.

For example, as shown in FIG. 30D, the first conductive layer 150includes a power line 151, a data line 152, a first connection block1541, a second connection block 1542, and a third connection block 1543that extend along the second direction. The data line 152 may beconnected to the second source region S2. The fourth source region S4 isconnected to the power line 151. The first connection block 1541 isconfigured to connect the initialization signal line 141 to the sixthsource region S6 and the seventh source region S7. The second connectionblock 1542 is configured to connect the third drain region D3 to thefirst electrode block CE1. The third connection block 1543 is connectedto the fifth drain region D5, and may be connected to a correspondinganode as a drain.

The following schematically describes a working manner of the pixeldriving circuit shown in FIG. 31 . First, when a reset signal istransmitted to the reset signal line 131 to conduct the seventh thinfilm transistor T7, remaining current that flows through the anode ofeach sub-pixel is discharged to the sixth thin film transistor T6through the seventh thin film transistor T7, to inhibit light emissioncaused by the remaining current that flows through the anode of eachsub-pixel. Then, when a reset signal is transmitted to the reset signalline 131 and an initialization signal is transmitted to theinitialization signal line 141, the sixth thin film transistor T6 isconducted, and an initialization voltage Vint is applied to a first gateelectrode of the first thin film transistor T1 and the first electrodeblock CE1 of the storage capacitor Cst through the sixth thin filmtransistor T6, so that the first gate electrode and the storagecapacitor Cst are initialized. The initialization of the first gateelectrode can conduct the first thin film transistor T1.

Subsequently, when a gate electrode signal is transmitted to the gateelectrode line 132 and a data signal is transmitted to the data line152, both the second thin film transistor T2 and the third thin filmtransistor T3 are conducted, and a data voltage Vd is applied to thefirst gate electrode through the second thin film transistor T2 and thethird thin film transistor T3. In this case, the voltage applied to thefirst gate electrode is a compensating voltage Vd+Vth, and thecompensating voltage applied to the first gate electrode is also appliedto the first electrode block CE1 of the storage capacitor Cst.

Subsequently, the power line 151 applies a drive voltage Vel to thesecond electrode block CE2 of the storage capacitor Cst, and applies thecompensating voltage Vd+Vth to the first electrode block CE1, so thatcharges corresponding to a difference between voltages that arerespectively applied to two electrodes of the storage capacitor Cst arestored in the storage capacitor Cst, and conduction of the first thinfilm transistor T1 reaches preset time.

Subsequently, when an emission control signal is applied to the emissioncontrol line 133, both the fourth thin film transistor T4 and the fifththin film transistor T5 are conducted, so that the fourth thin filmtransistor T4 applies the drive voltage Vel to the fifth thin filmtransistor T5. When the drive voltage Vel runs through the first thinfilm transistor T1 conducted by the storage capacitor Cst, a differencebetween the corresponding drive voltage Vel and the voltage that isapplied to the first gate electrode through the storage capacitor Cstdrives current Id to flow through the first drain region D3 of the firstthin film transistor T1, and drives the current Id to be applied to eachsub-pixel through the fifth thin film transistor T5, so that the lightemitting layer of each sub-pixel emits light.

In some examples, as shown in FIG. 33 and FIG. 34 , the displaysubstrate 100 further includes a first planarization layer 241, a secondconductive layer 160, a second planarization layer 242, and an anode175. The first planarization layer 241 is located on a side of the firstconductive layer 150 away from the base substrate 110. The secondconductive layer 160 is located on a side of the first planarizationlayer 241 away from the first conductive layer 150, and includes aconnection electrode 161. The second planarization layer 242 is locatedon a side of the second conductive layer 160 away from the firstplanarization layer 241. The anode 175 is located on a side of thesecond planarization layer 242 away from the second conductive layer160. The first planarization layer 241 includes a first via hole H1. Theconnection electrode 161 is connected to the sixth drain region S6through the first via hole H1. The second planarization layer 242includes a second via hole H2. The anode 175 is connected to theconnection electrode 161 through the second via hole H2.

In some examples, as shown in FIG. 33 , FIG. 34 , and FIG. 36 , thedisplay substrate 100 further includes a light emitting layer 180,located on a side of the anode layer 170 away from the base substrate110 and including a plurality of light emitting portions 185. Theplurality of light emitting portions 185 include a plurality of lightemitting groups 1850. Each light emitting group 1850 includes a firstlight emitting portion 1851, a second light emitting portion 1852, athird light emitting portion 1853, and a fourth light emitting portion1854. The first light emitting portion 1851 is at least partiallylocated in the first opening 1951 and covers an exposed portion of firstanode 1751. The second light emitting portion 1852 is at least partiallylocated in the second opening 1952 and covers an exposed portion of thesecond anode 1752. The third light emitting portion 1853 is at leastpartially located in the third opening 1953 and covers an exposedportion of the third anode 1753. The fourth light emitting portion 1854is at least partially located in the fourth opening 1954 and covers anexposed portion of the fourth anode 1754. The first light emittingportion 1851 is configured to emit light of a first color. The secondlight emitting portion 1852 and the third light emitting portion 1853are configured to emit light of a second color. The fourth lightemitting portion 1854 is configured to emit light of a third color.

For example, the first color is red (R), the second color is green (G),and the third color is blue (B). That is, the display substrate uses apixel arrangement structure of GGRB.

For example, as shown in FIG. 34 , the area in which the firstconductive portion 1621 located on a side of the first anode 1751 awayfrom the second anode 1752 is overlapped with the power line 151 locatedin the first conductive layer 150 is less than the area in which thesecond conductive portion 1622 located on a side of the first anode 1751close to the second anode 1752 is overlapped with the power line 151 inthe first conductive layer 150.

An embodiment of the present disclosure provides a display device. FIG.38 is a schematic diagram of a display device according to an embodimentof the present disclosure. As shown in FIG. 38 , the display device 400includes any foregoing display substrate 100. Therefore, the displaydevice includes beneficial effects corresponding to the beneficialeffects of the display substrate. Therefore, in the display device, thestability and the service life of the compensating thin film transistorcan be improved, thereby improving the long-term light emissionstability and the service life of the display substrate.

For example, the display device may be an electronic product thatincludes a display function, such as a TV, a computer, a notebookcomputer, a tablet computer, a mobile phone, a navigator, or anelectronic photo frame.

An embodiment of the present disclosure further provides a displaysubstrate. FIG. 39 is a schematic diagram of a display substrateaccording to an embodiment of the present disclosure; FIG. 40 is aschematic section view of a display substrate along line TT in FIG. 39 ;FIG. 41 is a schematic diagram of a second conductive layer and an anodelayer in a display substrate according to an embodiment of the presentdisclosure.

As illustrated in FIGS. 39-41 , the display substrate includes a basesubstrate 110, a pixel circuit layer 610, a first conductive layer 150,a first planarization layer 241, a second conductive layer 160, a secondplanarization layer 242, and a plurality of light emitting elementgroups 310. The pixel circuit layer 610 includes a plurality of pixeldriving circuits 265, the plurality of pixel driving circuits 265include a semiconductor layer 120. The first conductive layer 150 islocated at a side of the semiconductor layer 120 away from the basesubstrate 110. The first planarization layer 241 is located at the sideof the first conductive layer 150 away from the semiconductor layer 120.The second conductive layer 160 is located at the side of the firstplanarization layer 241 away from the first conductive layer 150. Thesecond planarization layer 242 is located at the side of the secondconductive layer 160 away from the base substrate 110. The plurality oflight emitting element groups 310 are located at a side of the secondplanarization layer 242 away from the second conductive layer 160. Thesecond conductive layer 160 includes a plurality of conductive portions162 arranged along a first direction, the size of each conductiveportion 162 in the second direction is greater than that in the firstdirection, and the second direction intersects with the first direction,the plurality of conductive portion 162 includes a first conductiveportion 1622, the first conductive portion 1622 includes a closedannular portion 1622E, the closed annular portion 1622E includes ahollow region 1622H.

As illustrated in FIGS. 39-41 , each light emitting element group 310includes a first light emitting element 311, the first light emittingelement 311 includes a first anode 1751, and the orthographic projectionof the first anode 1751 on the base substrate 110 overlaps with theorthographic projection of the closed annular portion 1622E on the basesubstrate 110. The plurality of conductive portions 162 also include asecond conductive portion 1621 adjacent to the first conductive portions1622, and the orthographic projection of the second conductive portion1621 on the base substrate 110 overlaps with the orthographic projectionof the first anode 1751 on the base substrate 110.

In the display substrate provided by the embodiment of the presentdisclosure, by providing the closed annular portion 1622E, the firstanode 1751 can overlap with the closed annular portion 1622E and thesecond conductive portion 1621 at the same time, so that the first anode1751 can be kept flat and color cast caused by inclination can beavoided. In addition, because the closed annular portion 1622E has ahollow design, the light transmittance of the display substrate can beimproved, and it is beneficial for the under-screen fingerprintrecognition device to receive signals.

In some examples, as illustrated in FIGS. 39-41 , the closed annularportion 1622E is separated from at least one conductive portion 162adjacent thereto in the first direction in the second conductive layer160, and the size of the closed annular portion 1622E in the firstdirection is at least greater than the size of a part of the firstconductive portion 1622 in the first direction. The plurality of pixeldriving circuits 265 include a first pixel driving circuit 2651, thefirst pixel driving circuit 2651 has a semiconductor pattern on thesemiconductor layer 120, the orthographic projection of the firstconductive portion 1622 on the base substrate 110 overlaps with theorthographic projection of the semiconductor pattern of the first pixeldriving circuit 2651 on the base substrate 110. The first pixel drivingcircuit 2651 includes a driving transistor T1, the first conductivelayer 150 includes a first conductive pattern 1542, the first conductivepattern 1542 has the same potential as the gate electrode of the drivingtransistor T1. The first conductive pattern 1542 and the gate electrodeof the driving transistor T1 together constitute a gate electrodepotential metal, and the orthographic projection of the hollow region1622H inside the closed annular portion 1622E on the base substrate 110overlaps with the orthographic projection of the gate electrodepotential metal on the base substrate.

In the display substrate provided by the embodiment of the presentdisclosure, on the one hand, the closed annular portion 1622E can ensurehigher flatness of the first anode 1751, thereby ensuring that theluminous intensity of the first anode 1751 in different directions isconsistent, and then effectively alleviating the phenomenon of colorcast; on the other hand, the orthographic projection of the hollowregion 1622H inside the closed annular portion 1622E on the basesubstrate 110 overlaps with the orthographic projection of the gateelectrode potential metal on the base substrate, so that the reset speedand charging speed of the gate electrode of the driving transistor canbe improved.

In some examples, as illustrated in FIGS. 39-41 , the inner side of theclosed annular portion 1622E includes a hollow region 1622H, and thefirst conductive portion 1622 has a plurality of hollow regions 1622 harranged along the second direction. Two adjacent hollow regions 1622Hhave approximately the same shape and size. The first conductive portion1622 can correspond to a plurality of first anodes 1751, so it has aplurality of hollow regions 1622H.

In some examples, as illustrated in FIGS. 39-41 , the first lightemitting element 311 includes an effective light emitting region, andthe orthographic projection of a straight line passing through thecenter of the effective light emitting region of the first lightemitting element 311 and extending in the second direction on the basesubstrate 110 is located between the orthographic projections of thefirst conductive portion 1622 and the second conductive portion 1621 onthe base substrate 110.

In some examples, as illustrated in FIGS. 39-41 , the two edges of theclosed annular portion 1622E in the first direction respectively overlapwith the orthographic projections of the anodes of the plurality oflight emitting elements in the light emitting element group on the basesubstrate, and the orthographic projections of the hollow regions 1622Hof the closed annular portion 1622E are separated from the orthographicprojections of the effective light emitting regions of the plurality oflight emitting elements on the base substrate 110 (i.e., arranged atintervals). Therefore, the display substrate can make full use of thespace on the display substrate on the one hand, and avoid adverseeffects on the display of light emitting elements on the other hand.

In some examples, as illustrated in FIGS. 39-41 , the first conductivelayer 150 further includes a conductive metal 152 configured to providepower to the pixel driving circuit 265, the first planarization layer241 includes a conductive metal via hole 241S, and the conductiveportion 162 is electrically connected with the conductive metal 152through the power line via hole 241S; the first pixel driving circuit2651 further includes a first light emitting control transistor T4 and astorage capacitor Cst, the storage capacitor includes a first electrodeblock CE1 and a second electrode block CE2, and the second electrodeblock CE2 is located at a side of the first electrode block CE1 awayfrom the base substrate 110, and the conductive metal 152 iselectrically connected with the source electrode of the first lightemitting control transistor T4 and the second electrode block CE2,respectively. Therefore, the display substrate can reduce the resistanceof conductive metal, reduce the voltage drop and improve the uniformityof the whole display panel through the plurality of conductive portionsof the second conductive layer.

In some examples, as illustrated in FIGS. 39-41 , the orthographicprojection of the closed annular portion 1622E on the base substrate 110overlaps with the orthographic projection of the first electrode blockCE1 on the base substrate 110; the second electrode block CE2 includesan opening 620, and the orthographic projection of the opening 620 onthe base substrate 110 overlaps with the orthographic projection of thefirst electrode block CE1 on the base substrate 110, and theorthographic projection of the closed annular portion 1622E on the basesubstrate 110 also overlaps with the orthographic projection of theopening 620 on the base substrate 110. Therefore, by shielding thecapacitor electrode, the capacitor can be prevented from beingexcessively irradiated by light, and the capacitor potential isstabilized and the charging and discharging speed is fast.

In some examples, as illustrated in FIGS. 39-41 , the first pixeldriving circuit 2651 further includes a data writing transistor T2, acompensating transistor T3, a reset transistor T6, an anodeinitialization transistor T7, and a second light emitting controltransistor T5. The display substrate further includes: a reset signalline 131, connected to the gate electrode of the reset transistor T6 andthe gate electrode of the anode initialization transistor T7,respectively; a gate line 132, connected to the gate electrode of thecompensating transistor T3 and the gate electrode of the data writingtransistor T2, respectively; an emission control line 133, connected tothe gate electrode of the first light emitting control transistor T4 andthe gate electrode of the second light emitting control transistor T5,respectively; and an initialization signal line 141, connected to thesource electrode of reset transistor T6 and the source electrode ofanode initialization transistor T7, respectively, and the orthographicprojection of closed annular portion 1622E on the base substrate 110respectively overlaps with the orthographic projections of the resetsignal line 131, the gate line 132 and the initialization signal line133 on base substrate 110. Because the closed annular portion is hollow,the overlapping area with the reset signal line 131, the gate line 132and the initialization signal line 133 is small, and potentialinterference to these signal lines can be avoided. It should be notedthat the above layered schematic diagram of the pixel driving circuitand the connection relationship of each transistor can be seen in therelated descriptions of FIGS. 30A-30D and FIG. 31 .

In some examples, as illustrated in FIGS. 39-41 , one end of the firstconductive pattern 1542 is electrically connected to the gate electrodeof the driving transistor T1 through the opening 620, and the other endof the first conductive pattern 1542 is electrically connected to thedrain electrode or the source electrode of the compensating transistorT3. Accordingly, the first conductive pattern 1542 has the samepotential as the gate electrode of the driving transistor T1.

In some examples, as illustrated in FIGS. 39-41 , the closed annularportion 1622E includes a first portion 631 and a second portion 632arranged along a first direction, and a third portion 633 and a fourthportion 634 arranged along a second direction. The first portion 631,the third portion 633, the second portion 632 and the fourth portion 634are connected end to end to form the closed annular portion 1622E, andthe orthographic projections of the first portion 631 and the secondportion 632 on the base substrate 110 overlap with the orthographicprojection of the second electrode block CE2 on the base substrate 110.Therefore, the capacitance of the storage capacitor Cst can beincreased.

For example, the orthographic projection of the third portion 633 on thebase substrate 110 overlaps with the orthographic projection of thesecond electrode block CE2 on the base substrate 110, so that thecapacitance of the storage capacitor Cst can be further increased.

In some examples, as illustrated in FIGS. 39-41 , the orthographicprojection of the first portion 631 on the base substrate 110 overlapswith the orthographic projection of the first conductive pattern 1542 onthe base substrate 110, and the first conductive pattern 1542 and thefirst conductive pattern 1542 are both elongated in shape, and theextending direction of the long edge of the first conductive pattern1542 is the same as the extending direction of the long edge of thefirst portion 631. By making the extending direction of the firstportion and the first conductive pattern the same, the area of theoverlapping region of the first portion and the first conductive patternis as small as possible, thereby reducing the load of the gate electrodeof the driving transistor and improving the reset speed and chargingspeed of the gate electrode of the driving transistor.

In some examples, as illustrated in FIGS. 39-41 , the first conductivelayer 150 further includes a second conductive pattern 1541, the secondconductive pattern 1541 is respectively connected with theinitialization signal line 141 and the source electrode of the resettransistor T6. The orthographic projection of the third portion 633 onthe base substrate 110 overlaps with the orthographic projection of theinitialization signal line 141 on the base substrate 110, theorthographic projection of the third portion 633 on the base substrate110 overlaps with the orthographic projection of the second conductivepattern 1541 on the base substrate 110, the orthographic projection ofthe fourth portion 634 on the base substrate 110 overlaps with theorthographic projection of the first conductive pattern 1542 on the basesubstrate 110.

In some examples, as illustrated in FIGS. 39-41 , the orthogonalprojection of the hollow region 1622H on the base substrate 110 overlapswith the orthographic projection of the initialization signal line 141on the base substrate 110, and the orthogonal projection of the hollowregion 1622H on the base substrate 110 overlaps with the orthographicprojection of the second conductive pattern 1541 on the base substrate110, the orthographic projection of the hollow region 1622H on the basesubstrate 110 overlaps with the orthographic projection of the secondelectrode block CE2 on the base substrate 110.

In some examples, as illustrated in FIGS. 39-41 , the display substratefurther includes: a second planarization layer 242 located at the sideof the second conductive layer 160 away from the base substrate 110; anda plurality of light emitting element groups 310 located at a side ofthe second planarization layer 242 away from the second conductive layer160. The plurality of light emitting element groups 310 are arrangedalong a first direction to form a plurality of light emitting elementcolumns 320 and along a second direction to form a plurality of lightemitting element rows 330. Each light emitting element group 310includes a first light emitting element 311, a second light emittingelement 312, a third light emitting element 313 and a fourth lightemitting element 314. The second light emitting element 312 and thethird light emitting element 313 are arranged along the second directionto form a light emitting element pair 315, and the first light emittingelement 311, the light emitting element pair 315 and the fourth lightemitting element 314 are arranged along the first direction. The firstlight emitting element 311 includes a first anode 1751, the second lightemitting element 312 includes a second anode 1752, the third lightemitting element 313 includes a third anode 1753, and the fourth lightemitting element 314 includes a fourth anode 1754. The second conductivelayer 160 includes a first connection electrode 1611, a secondconnection electrode 1612, a third connection electrode 1613 and afourth connection electrode 1614, the second planarization layer 242includes a first via hole 2421, a second via hole 2422, a third via hole2423 and a fourth via hole 2424. The first anode 1751 is connected withthe first connection electrode 1611 through the first via hole 2421, thesecond anode 1752 is connected to the second connection electrode 1612through the second via hole 2422, the third anode 1753 is connected tothe third connection electrode 1613 through the third via hole 2423, andthe fourth anode 1754 is connected to the fourth connection electrode1614 through the fourth via hole 2424.

In some examples, the first anode 1751 includes a main body portion, andthe orthographic projection of the effective light emitting region ofthe first light emitting element 311 on the base substrate 110 islocated within the orthographic projection of the main body portion ofthe first anode 1751 on the base substrate 110, and the main bodyportion of the first anode 1751 and the first anode 1751 have at leastpartially the same boundary. The second anode 1752 includes a main bodyportion, and the orthographic projection of the effective light emittingregion of the second light emitting element 312 on the base substrate110 is located within the orthographic projection of the main bodyportion of the second anode 1752 on the base substrate 110, and the mainbody portion of the second anode 1752 and the second anode 1752 have atleast partially the same boundary. The third anode 1753 includes a mainbody portion, and the orthographic projection of the effective lightemitting region of the third light emitting element 313 on the basesubstrate 110 is located within the orthographic projection of the mainbody portion of the third anode 1753 on the base substrate 110, and themain body portion of the third anode 1753 and the third anode 1753 haveat least partially the same boundary. The fourth anode 1754 includes amain body portion, and the orthographic projection of the effectivelight emitting region of the fourth light emitting element 314 on thebase substrate 110 is located within the orthographic projection of themain body portion of the fourth anode 1754 on the base substrate 110,and the main body portion of the fourth anode 1754 and the fourth anode1754 have at least partially the same boundary.

In some examples, the plurality of conductive portions 162 include asecond conductive portion 1621, the first conductive portion 1622 andthe second conductive portion 1621 are respectively located at two sidesof the effective light emitting region of the first light emittingelement 311 in the first direction, and the distance between theorthographic projection of the closed annular portion 1622E on the basesubstrate 110 and the orthographic projection of the center of theeffective light emitting region of the first light emitting element 311on the base substrate 110 is approximately the same as the distancebetween the orthographic projection of the second conductive portion1621 on the base substrate 110 and the orthographic projection of thecenter of the effective light emitting region of the first lightemitting element 311 on the base substrate 110. Therefore, the closedannular portion 1622E can ensure high flatness of the first anode 1751,thereby ensuring that the luminous intensity of the first anode 1751 isconsistent in different directions, and further effectively alleviatingcolor cast.

In some examples, as illustrated in FIGS. 39-41 , the orthographicprojection of the first anode 1751 on the base substrate 110 overlapswith the orthographic projection of the emission control line 133 of thefirst pixel driving circuit 2651 on the base substrate 110. Byoverlapping the first anode with the emission control line, theconnection electrode of the first anode located in the second conductivelayer can be moved down, so that the center of the third conductivepattern in the first conductive layer overlaps with the emission controlline, ensuring the flatness of the third conductive pattern andimproving the effectiveness of via hole connection.

In some examples, as illustrated in FIGS. 39-41 , a fourth lightemitting element 314 is arranged at a position adjacent to the center ofthe hollow region 1622H in the second direction, and the orthographicprojection of the fourth light emitting element 314 (for example, thefourth anode 1754 of the fourth light emitting element 314) on the basesubstrate 110 overlaps with all of the orthographic projections of thegate line 132, the reset signal line 131 and the initialization signalline 141 on the base substrate 110.

In some examples, as illustrated in FIGS. 39-41 , the first conductivelayer 151 further includes a third conductive pattern 1543, and thesecond conductive layer 160 further includes an anode connection portion161, that is, the above-mentioned connection electrode, and the thirdconductive pattern 1543 is connected with the drain electrode of thesecond light emitting control transistor T5 and the anode connectionportion 161.

In some examples, as illustrated in FIGS. 39-41 , the orthographicprojection of the gate line 132 on the base substrate 110 overlaps withthe orthographic projection of the first conductive pattern 1542 on thebase substrate 110.

In some examples, as illustrated in FIGS. 39-41 , the orthographicprojections of the first electrode block CE1 and the second electrodeblock CE2 on the base substrate 110 are located between the orthographicprojection of the gate line 132 on the base substrate 110 and theorthographic projection of the emission control line 133 on the basesubstrate 110, that is, The orthographic projection of the storagecapacitor Cst on the base substrate 110 is located between theorthographic projection of the gate line 132 on the substrate 110 andthe orthographic projection of the emission control line 133 on the basesubstrate 110, so that the space can be reasonably utilized.

In some examples, as illustrated in FIGS. 39-41 , the orthographicprojection of the reset signal line 131 on the base substrate 110 islocated between the orthographic projection of the gate line 132 on thebase substrate 110 and the orthographic projection of the initializationsignal line 141 on the base substrate 110, furthermore, in one pixeldriving circuit 265, the emission control line 133, the first electrodeblock CE1, the gate line 132, the reset signal line 131 and theinitialization signal line 141 are arranged along the second direction,so that the space on the display substrate can be reasonably utilized.

In some examples, as illustrated in FIGS. 39-41 , the plurality of pixeldriving circuits 265 include a second gate electrode layer 140, thesecond electrode block CE2 is located in the second gate electrode layer140, and at least two second electrode blocks CE2 are connected in thefirst direction. That is, at least two second electrode blocks CE2located in the second gate electrode layer 140 can be electricallyconnected with each other, so that the uniformity of storage capacitanceof different sub-pixels in the whole display panel can also be improved.

In some examples, as illustrated in FIGS. 39-41 , the orthographicprojections of the effective light emitting regions of the first lightemitting element 312 and the second light emitting element 313 on thebase substrate 110 do not overlap with the orthographic projection ofthe conductive portion 162 on the base substrate 110. Therefore, it canavoid the conductive portion from adversely affecting the flatness ofthe first light emitting element 311 and the second light emittingelement 312. For example, the second light emitting element 312 isconfigured to emit green light.

In some examples, as illustrated in FIGS. 39-41 , the orthographicprojection of the center of the effective light emitting region of thefourth light emitting element 314 on the base substrate 110 overlapswith the orthographic projection of the conductive portion 162 on thebase substrate 110. A part where the orthographic projections of theconductive portion 162 and the center of the effective light emittingregion of the fourth light emitting element 314 is a solid part.Therefore, although the effective light emitting region of the fourthlight emitting element 314 overlaps with the conductive portion 162, theorthographic projection of the center of the effective light emittingregion of the fourth light emitting element 314 on the base substrate110 overlaps with the orthographic projection of the conductive portion162 on the base substrate 110, which can avoid the conductive portionfrom adversely affecting the flatness of the fourth light emittingelement 314. For example, the fourth light emitting element 314 isconfigured to emit blue light. It should be noted that theabove-mentioned “solid part” means that the part does not include thehollow.

In some examples, as illustrated in FIGS. 39-41 , the second lightemitting element 312 includes a second anode 1752, and the third lightemitting element 313 includes a third anode 1753; areas of twooverlapping regions of the main body portion of the second anode 1752and two conductive portions 162 adjacent to the second anode 1752 in thefirst direction are approximately the same, and areas of two overlappingregions of the main body portion of the third anode 1753 and twoconductive portions 162 adjacent to the third anode 1753 in the firstdirection are approximately the same. Therefore, the flatness of thesecond anode and the third anode can be further improved.

In some examples, as illustrated in FIGS. 39-41 , the orthographicprojection of the hollow region 1622H on the base substrate 110 islocated between the effective light emitting region of the first lightemitting element 311 and the effective light emitting region of thesecond light emitting element 312. Therefore, the hollow region canavoid the effective light emitting region and avoid the anode in theeffective light emitting region from being sunken and causing colorcast. It should be noted that the first light emitting element and thesecond light emitting element are the first light emitting element andthe second light emitting element which are closest to each other in thefirst direction.

In some examples, as illustrated in FIGS. 39-41 , in the firstdirection, the size of an intermediate portion of an anode (e.g., thefirst anode) of the light emitting element configured to emit red lightin the second direction is greater than the size of an edge portion ofthe anode in the second direction, for example, the shape of the anodecan be approximately a long hexagon; in the first direction, the size ofan intermediate portion of an anode (e.g., the fourth anode) of thelight emitting element configured to emit blue light in the seconddirection is greater than the size of an edge portion of the anode inthe second direction. Therefore, the display substrate can make full useof the space between different anodes, and under the same processaccuracy, the areas of the anodes of the light emitting elementconfigured to emit red light and the light emitting element configuredto emit blue light are maximized.

In some examples, as illustrated in FIG. 39-41 , in one light emittingelement group, the orthographic projections of the anodes 175 of atleast two light emitting elements on the base substrate 110 overlap withthe orthographic projection of the opening of the second electrode blockCE2 on the base substrate 110. Therefore, by shielding the opening ofthe second electrode block, the gate electrode of the driving transistorcan be shielded and prevented from being excessively irradiated bylight. The orthographic projection of the effective light emittingregion of at least one light emitting element 311, 312, 313 or 314 onthe base substrate 110 does not overlap with the orthographic projectionof the first electrode block CE1 or the second electrode block CE2 onthe base substrate 110, so that it can avoid the capacitor from raisingthe effective light emitting region and avoid color cast or colordeviation.

In some examples, in any light emitting element selected from the groupconsisting of the first light emitting element 311, the second lightemitting element 312, the third light emitting element 313 and thefourth light emitting element 314, the first planarization layer 241 hasan anode hole, and the anode of the light emitting element is connectedwith the pixel driving circuit corresponding to the light emittingelement through the anode hole.

In some examples, as illustrated in FIGS. 39-41 , the orthographicprojection of the anode hole (e.g., the first via hole 2421) of theanode (e.g., the first anode 1751) of the light emitting elementconfigured to emit red light on the base substrate 110 does not overlapwith the orthographic projection of the main body portion of the anodeon the base substrate in the second direction. The orthographicprojection of the anode hole of the anode on the base substrate 110 doesnot overlap with the orthographic projection of the effective lightemitting region of the light emitting element configured to emit redlight on the base substrate 110 in the second direction, so that theanode hole of the anode of the light emitting element configured to emitred light can be prevented from adversely affecting the flatness of thefirst light emitting element.

In some examples, as illustrated in FIGS. 39-41 , the orthographicprojection of the anode hole (e.g., the fourth via hole 2424) of theanode (e.g., the fourth anode 1754) of the light emitting elementconfigured to emit blue light on the base substrate 110 does not overlapwith the orthographic projection of the main body portion of the anodeon the base substrate in the second direction. The orthographicprojection of the anode hole of the anode on the base substrate 110 doesnot overlap with the orthographic projection of the effective lightemitting region of the light emitting element configured to emit bluelight on the base substrate 110 in the second direction, so that theanode hole of the anode of the light emitting element configured to emitblue light can be prevented from adversely affecting the flatness of thefourth light emitting element.

In some examples, as illustrated in FIGS. 39-41 , a data line 152 isarranged between two adjacent conductive portions 162, and the distancebetween the orthographic projections of any one of the two adjacentconductive portions 162 and the data line 152 on the base substrate 110is less than the distance between the orthographic projections of thetwo adjacent conductive portions 162 on the base substrate 110.

An embodiment of the present disclosure further provides a displaydevice. FIG. 42 is a schematic diagram of a display device according toan embodiment of the present disclosure. As illustrated in FIG. 42 , thedisplay device 400 includes any one of the display substrates 100 asdescribed above. Therefore, the display device has the beneficialeffects corresponding to the beneficial effects of the displaysubstrate. For example, the display device can improve the stability andlife of the compensation thin film transistor, thereby improving thelong-term luminous stability and life of the display substrate.

For example, the display device can be electronic products with displayfunctions such as televisions, computers, notebook computers, flatcomputers, mobile phones, navigators, and electronic photo frames.

It is to be noted that:

(1) In the drawings of the embodiments of the present disclosure, onlythe structures related to the embodiments of the present disclosure areinvolved, and other structures may refer to the common design(s).

(2) In case of no conflict, features in one embodiment or in differentembodiments of the present disclosure can be combined.

The above are merely particular embodiments of the present disclosurebut are not limitative to the scope of the present disclosure; thescopes of the present disclosure should be defined in the appendedclaims.

The invention claimed is:
 1. A display substrate, comprising: a basesubstrate; a plurality of pixel driving circuits, comprising asemiconductor layer; a first conductive layer, at a side of thesemiconductor layer away from the base substrate; a first planarizationlayer, at a side of the first conductive layer away from the basesubstrate; a second conductive layer, at a side of the firstplanarization layer away from the first conductive layer; a secondplanarization layer, at a side of the second conductive layer away fromthe base substrate; and a plurality of light emitting element groups, ata side of the second planarization layer away from the second conductivelayer, wherein the second conductive layer comprises a plurality ofconductive portions arranged along a first direction, a size of each ofthe plurality of conductive portions in the second direction is greaterthan a size of each of the plurality of conductive portions in the firstdirection, the second direction intersects with the first direction, andthe plurality of conductive portions comprise a first conductiveportion, the first conductive portion comprises a closed annularportion, the closed annular portion is separated from at least oneconductive portion adjacent thereto in the first direction in the secondconductive layer, each of the plurality of light emitting element groupscomprises a first light emitting element, the first light emittingelement comprises a first anode, and an orthographic projection of thefirst anode on the base substrate overlaps with an orthographicprojection of the closed annular portion on the base substrate; theplurality of conductive portions further comprise a second conductiveportion adjacent to the first conductive portion, and an orthographicprojection of the second conductive portion on the base substrateoverlaps with the orthographic projection of the first anode on the basesubstrate.
 2. The display substrate according to claim 1, wherein a sizeof the closed annular portion in the first direction is at least greaterthan a size of a part of the first conductive portion in the firstdirection, and the plurality of pixel driving circuits comprise a firstpixel driving circuit, the first pixel driving circuit has asemiconductor pattern on the semiconductor layer, an orthographicprojection of the first conductive portion on the base substrateoverlaps with an orthographic projection of the semiconductor pattern ofthe first pixel driving circuit on the base substrate, the first pixeldriving circuit comprises a driving transistor, and the first conductivelayer comprises a first conductive pattern, the first conductive patternhas a same potential as a gate electrode of the driving transistor, thefirst conductive pattern and the gate electrode of the drivingtransistor together constitute a gate electrode potential metal, and anorthographic projection of a hollow region inside the closed annularportion on the base substrate overlaps with an orthographic projectionof the gate electrode potential metal on the base substrate.
 3. Thedisplay substrate according to claim 2, wherein two edges of the closedannular portion in the first direction respectively overlap withorthographic projections of anodes of the plurality of light emittingelements in the light emitting element group on the base substrate, andan orthographic projection of a hollow region of the closed annularportion on the base substrate is separated from an orthographicprojection of the effective light emitting regions of the plurality oflight emitting elements on the base substrate.
 4. The display substrateaccording to claim 2, wherein the first conductive layer furthercomprises a conductive metal configured to provide power to the pixeldriving circuit, the first planarization layer comprises a conductivemetal via hole, and the conductive portion is electrically connectedwith the conductive metal through the conductive metal via hole, thefirst pixel driving circuit further comprises a first light emittingcontrol transistor and a storage capacitor, the storage capacitorcomprises a first electrode block and a second electrode block, thesecond electrode block is located at a side of the first electrode blockaway from the base substrate, and the conductive metal is respectivelyelectrically connected with the source electrode of the first lightemitting control transistor and the second electrode block.
 5. Thedisplay substrate according to claim 4, wherein an orthographicprojection of the closed annular portion on the base substrate overlapswith an orthographic projection of the first electrode block on the basesubstrate, the second electrode block comprises an opening, anorthographic projection of the opening on the base substrate overlapswith an orthographic projection of the first electrode block on the basesubstrate, and an orthographic projection of the closed annular portionon the base substrate also overlaps with the orthographic projection ofthe opening on the base substrate.
 6. The display substrate according toclaim 5, wherein the first pixel driving circuit further comprises adata writing transistor, a compensating transistor, a reset transistor,an anode initialization transistor and a second light emitting controltransistor, the display substrate further comprises: a reset signal lineconnected to a gate electrode of the reset transistor; a gate lineconnected to a gate electrode of the compensating transistor; anemission control line connected to a gate electrode of the first lightemitting control transistor; and an initialization signal line connectedto a source electrode of the reset transistor, wherein an orthographicprojection of the closed annular portion on the base substraterespectively overlaps with orthographic projections of the reset signalline, the gate line and the initialization signal line on the basesubstrate.
 7. The display substrate according to claim 6, wherein oneend of the first conductive pattern is electrically connected to thegate electrode of the driving transistor through the opening, and theother end of the first conductive pattern is electrically connected tothe source electrode or drain electrode of the compensating transistor.8. The display substrate according to claim 6, wherein the closedannular portion comprises a first portion and a second portion arrangedalong the first direction, and a third portion and a fourth portionarranged along the second direction, the first portion, the thirdportion, the second portion and the fourth portion are connected end toend to form the closed annular portion, and orthographic projections ofthe first portion and the second portion on the base substrate overlapwith an orthographic projection of the second electrode block on thebase substrate.
 9. The display substrate according to claim 8, whereinthe first conductive layer further comprises a second conductive patternand a third conductive pattern, the second conductive pattern isrespectively connected with the initialization signal line and thesource electrode of the reset transistor, and the second conductivelayer further comprises an anode connection portion, and the thirdconductive pattern is connected with a drain electrode of the secondlight emitting control transistor and the anode connection portion, anorthographic projection of the third portion on the base substrateoverlaps with an orthographic projection of the initialization signalline on the base substrate, the orthographic projection of the thirdportion on the base substrate overlaps with an orthographic projectionof the second conductive pattern on the base substrate, an orthographicprojection of the fourth portion on the base substrate overlaps with anorthographic projection of the first conductive pattern on the basesubstrate.
 10. The display substrate according to claim 8, wherein anorthographic projection of the hollow region on the base substrateoverlaps with an orthographic projection of the initialization signalline on the base substrate, the orthographic projection of the hollowregion on the base substrate overlaps with an orthographic projection ofthe second conductive pattern on the base substrate, and theorthographic projection of the hollow region on the base substrateoverlaps with an orthographic projection of the second electrode blockon the base substrate.
 11. The display substrate according to claim 6,wherein the plurality of light emitting element groups are arrangedalong the first direction to form a plurality of light emitting elementcolumns and along the second direction to form a plurality of lightemitting element rows, each of the plurality of light emitting elementgroups comprises one first light emitting element, one second lightemitting element, one third light emitting element and one fourth lightemitting element, and the first anode comprises a main body portion, anorthographic projection of an effective light emitting region of thefirst light emitting element on the base substrate is located within anorthographic projection of the main body portion of the first anode onthe base substrate, and the main body portion of the first anode and thefirst anode have at least partially a same boundary, the plurality ofconductive portions comprise a second conductive portion, the firstconductive portion and the second conductive portion are respectivelylocated at two sides of the effective light emitting region of the firstlight emitting element in the first direction, and a distance between anorthographic projection of the closed annular portion on the basesubstrate and an orthographic projection of a center of the effectivelight emitting region of the first light emitting element on the basesubstrate is approximately the same as a distance between anorthographic projection of the second conductive portion on the basesubstrate and an orthographic projection of a center of the effectivelight emitting region of the first light emitting element on the basesubstrate.
 12. The display substrate according to claim 11, wherein anorthographic projection of the first anode on the base substrateoverlaps with an orthographic projection of the emission control line ofthe first pixel driving circuit on the base substrate, and a fourthlight emitting element is arranged at a position adjacent to a center ofthe hollow region in the second direction, and an orthographicprojection of an anode of the fourth light emitting element on the basesubstrate overlaps with all of orthographic projections of the gateline, the reset signal line and the initialization signal line on thebase substrate.
 13. The display substrate according to claim 11, whereinan orthographic projection of the gate line on the base substrateoverlaps with an orthographic projection of the first conductive patternon the base substrate, in one of the pixel driving circuits,orthographic projections of the first electrode block and the secondelectrode block on the base substrate are located between anorthographic projection of the gate line on the base substrate and anorthographic projection of the emission control line on the basesubstrate, an orthographic projection of the reset signal line on thebase substrate is located between the orthographic projection of thegate line on the base substrate and the orthographic projection of theinitialization signal line on the base substrate, the emission controlline, the first electrode block, the gate line, the reset signal lineand the initialization signal line are arranged along the seconddirection.
 14. The display substrate according to claim 11, wherein theplurality of pixel driving circuits further comprise a second gateelectrode layer located at a side of the first conductive layer close tothe base substrate, the second electrode block is located in the secondgate electrode layer, and at least two of the second electrode blocksare connected in the second gate electrode layer.
 15. The displaysubstrate according to claim 11, wherein orthographic projections of theeffective light emitting region of the first light emitting element andthe effective light emitting region of the second light emitting elementon the base substrate do not overlap with an orthographic projection ofthe conductive portion on the base substrate, and the second lightemitting element is configured to emit green light, an orthographicprojection of a center of the effective light emitting region of thefourth light emitting element on the base substrate overlaps with theorthographic projection of the conductive portion on the base substrate,and a part where orthographic projections of the conductive portion andthe center of the effective light emitting region of the fourth lightemitting element on the base substrate overlap with each other is asolid part, and the fourth light emitting element is configured to emitblue light.
 16. The display substrate according to claim 11, wherein thesecond light emitting element comprises a second anode, and anorthographic projection of the effective light emitting region of thesecond light emitting element on the base substrate is located within anorthographic projection of the main body portion of the second anode onthe base substrate, and the main body portion of the second anode andthe second anode have at least partially a same boundary, areas of twooverlapping regions of the main body portion of the second anode and twoconductive portions adjacent to the second anode in the first directionare approximately the same.
 17. The display substrate according to claim11, wherein, in the first direction, a size of an intermediate portionof an anode of the light emitting element configured to emit red lightin the second direction is greater than a size of an edge portion of theanode in the second direction, in the first direction, a size of anintermediate portion of an anode of the light emitting elementconfigured to emit blue light in the second direction is greater than asize of an edge portion of the anode in the second direction.
 18. Thedisplay substrate according to claim 1, wherein an inner side of theclosed annular portion has a hollow region, the first conductive portionhas a plurality of hollow regions arranged along the second direction,and shapes and sizes of two adjacent hollow regions are approximatelythe same.
 19. The display substrate according to claim 1, wherein thefirst light emitting element comprises an effective light emittingregion, and an orthographic projection of a straight line passingthrough a center of the effective light emitting region of the firstlight emitting element and extending in the second direction on the basesubstrate is located between an orthographic projection of the firstconductive portion on the base substrate and an orthographic projectionof the second conductive portion on the base substrate.
 20. A displaydevice comprising the display substrate according to claim 1.